Two 360 builds idea for heads

-

67/6barracuda

FABO Gold Member
FABO Gold Member
Joined
Jun 24, 2013
Messages
1,403
Reaction score
2,118
Location
Sharpsburg, GA
I have two 360’s I want to build with time, money, and motivation permitting. Have most of the parts. 1# stock stroke, ‘91 roller, speedpros H116cp .030 flat tops, scat I beam rods, cam?, airgap intake, Doug’s headers. 2# is a ‘75 360LA stoke stroke, .030 KB373 pistons, 915’s 1.88v, stock rods, airgap, patriot headers. I have several sets of 308’s and 915’s that I can rework. Or should I look at buying a set of speedmasters or these beautiful NOS 574heads. Of course budget in mind if I buy new heads it will set my projects back awhile until I can get my machine work done on the block. I am in no rush though these are spare motors.
F923A701-CE7D-4EE8-8BA4-7F7B36E390D9.png
2DF6689D-93F7-4920-9594-C4F889BF947A.png
 
I guess it depends how what the rest of your combination is like, but I like this cam for the 360 roller engine. Howards Cams, Rattler Retro-Fit Hydraulic Roller Camshaft, Chev SB LA, 227/235 @ .050, .525/.530, 109 LS - Competition Products One reason I listed it is because it's in stock, and that's a rarity right now. Get the block deck cut for zero deck on the pistons, about .027. I would get the cam now, get the bottom end together, and then wait until the Black Friday Speedmaster to get a pair of CNC heads. Get them to a machine shop and get a good three angle valve job on them. That's what I've got on engine a, anyway.
 
Just a question....who are you using for machine work?
 
I kornfrooshed a little. Are you building both engines and asking for advice or askin which engine to build and advice for one?
 
Last edited:
I guess it depends how what the rest of your combination is like, but I like this cam for the 360 roller engine. Howards Cams, Rattler Retro-Fit Hydraulic Roller Camshaft, Chev SB LA, 227/235 @ .050, .525/.530, 109 LS - Competition Products One reason I listed it is because it's in stock, and that's a rarity right now. Get the block deck cut for zero deck on the pistons, about .027. I would get the cam now, get the bottom end together, and then wait until the Black Friday Speedmaster to get a pair of CNC heads. Get them to a machine shop and get a good three angle valve job on them. That's what I've got on engine a, anyway.
I guess it depends how what the rest of your combination is like, but I like this cam for the 360 roller engine. Howards Cams, Rattler Retro-Fit Hydraulic Roller Camshaft, Chev SB LA, 227/235 @ .050, .525/.530, 109 LS - Competition Products One reason I listed it is because it's in stock, and that's a rarity right now. Get the block deck cut for zero deck on the pistons, about .027. I would get the cam now, get the bottom end together, and then wait until the Black Friday Speedmaster to get a pair of CNC heads. Get them to a machine shop and get a good three angle valve job on them. That's what I've got on engine a, anyway.
That looks like a nice grind. How’s it do in your Combo. I have a 727 with trans go 2 shift kit with a 3k stall, also a 904 reverse manual with a 2500k stall, 3.27 rear gear in the 8.8.
 
I kornfrooshed a little. Are you building both engines and asking for advice or askin which engine to build ans advice for one?
I’m going to slowly build both overtime the LA I can build now. I had the crank checked out last week. The block had only 3k miles on new build when spun a cam bearing slightly, its salvageable the parts where externally balanced with the kb373 quench pistons and the heads 915’s where shaved. The guy I picked it up from said it was around 11.1cr with 180psi cranking pressure with a 240’ish cam according to him. The roller block needs machining for the over bore, possibly decking if I go for zero deck, crank needs turned and balanced for the new rods, pistons, etc.
 
I’m going to slowly build both overtime the LA I can build now. I had the crank checked out last week. The block had only 3k miles on new build when spun a cam bearing slightly, its salvageable the parts where externally balanced with the kb373 quench pistons and the heads 915’s where shaved. The guy I picked it up from said it was around 11.1cr with 180psi cranking pressure with a 240’ish cam according to him. The roller block needs machining for the over bore, possibly decking if I go for zero deck, crank needs turned and balanced for the new rods, pistons, etc.

The LA sounds like fun. lol I like the look of Scott's machine shop. That's not too far from me. I've just started using my friend Richie. He's huge into the dirt track scene....and I mean the ones that run 150K dollar engines so he's good. So far, everything he's done for me has been dead nuts on.
 
Last edited:
I haven’t ran it, but it has a 103 intake lobe center. Going strictly by the numbers on probably about 10:1 with the 68 cc speed master chambers and your 3000 rpm converter it or the Big Mama Rattler (the next step up, also in stock) would work pretty well, but I would use the smaller one with 3.27 gears. I don’t know about in the stock status, as the cores for everything are low right now, but these roller lifters with your lifter yokes (dog bones) and retainer (spider).
High Performance Lifters Hydraulic Roller 5.2/5.9 Dodge Magnum
 
Yeah, that LA definitely looks like a lot of fun! On a side note, my very old school machinist tells me to hold about 6500 rpm limit on the cast crank bottom end. I’m sure there exceptions to the rule, but that’s what he suggests with the stock crank.
 
I guess I was asking about the heads. If I should go aluminum or cast. Only cause I can get my hands on a new set of cast 2.02’s MP5249574 or I can wait till the sale for speedmaster and go aluminum. Or say the hell with it save my money and redo what I already have 308’s or 915’s. I’m conflicted. I have parts everywhere in the garage.
EFDA967D-0DEA-4957-B495-2148155BAE14.jpeg
D171C7F4-EBAB-4875-B72A-CBC09E13C052.jpeg
 
Yeah, that LA definitely looks like a lot of fun! On a side note, my very old school machinist tells me to hold about 6500 rpm limit on the cast crank bottom end. I’m sure there exceptions to the rule, but that’s what he suggests with the stock crank.
I guess I was asking about the heads. If I should go aluminum or cast. Only cause I can get my hands on a new set of cast 2.02’s MP5249574 or I can wait till the sale for speedmaster and go aluminum. Or say the hell with it save my money and redo what I already have 308’s or 915’s. I’m conflicted. I have parts everywhere in the garage.View attachment 1715711485 View attachment 1715711486
For the LA I have two hydraulic cams that may not be ideal but I have em. A performer RPM 7177 308* dur. 112*CL 488”lift and a MP4286630 280* dur. 110*CL .474” lift. The MP is new but has rust on it that needs a lot of cleaning maybe a vinegar bath and see how it turns out. Wish it was stored better.
6CCAF74B-C750-4C1B-B25C-2B0AE5E3955B.jpeg
 
For the LA I have two hydraulic cams that may not be ideal but I have em. A performer RPM 7177 308* dur. 112*CL 488”lift and a MP4286630 280* dur. 110*CL .474” lift. The MP is new but has rust on it that needs a lot of cleaning maybe a vinegar bath and see how it turns out. Wish it was stored better. View attachment 1715711491

That MP cam is a good one. It will clean right up in vinegar. Don't worry about it. Might have some staining on it, but it will run just fine.
 
Im at a similar crossroads. I am planning for 2 more 360s I want to do a mild one similar to the one I built for the dart, and a wild one. I want to build a race car im not sure what chassis im gonna be using yet but im looking at ideas for the engine. I will probably leave the stoke stock since I have like 4, 3.58 cranks! But the top end im thinking of going with some aluminum heads. Iv already been looking at solid roller cams and roller rockers. Man that stuff is expensive! I don't understand how guys do it! Lol so I will probably end up using a set of cheaper speedmaster heads and do some home porting. Idk yet from the looks of it I will have more money into a roller cam setup than my entire 360 that's in my dart lol
 
Last edited:
Take this cam, “The performer RPM 7177 308* dur. 112*CL 488”lift” and sell it. Or! Cut it up and use it for fishing weights.

Do so use the Purple Cam.
 
Cut it up and use it for fishing weights.
:rofl::rofl::rofl:
They also make a good property marker stake, too! But I'm all in on the purple shaft, too, that's a good cam. I would sale all the old iron and get the new 574's to run with it on the LA. You can use the MP high swirl templates on those heads for a moderate DIY improvement. Professional porters get some decent numbers out of them if you spend the $$$ on them.
 
I would go with the Speed masters(plus machine check and a better valve job.
Also like the 474/280 MP cam. it ran good in my 340 for 15 plus years. flattens my first one after many years, and bought another.
3800 pound car, 2800 stall and 391 gears. I like the way it ran and sounded.
 
With the shortage of cam cores, he might make good money selling it to have it reground. Maybe?
 
It appears the Indy heads about on par with speedmasters? View attachment 1715711895View attachment 1715711896
Those are rebuilt stock heads by Indy vs the Edelbrock copy cat head. If you’d going to do an Edelbrock copy cat head, do these;

Shocker 185 Mopar CNC (Sold in Pairs) - PROMAXX Performance Products

Or step all the way up to Trick Flows. The draw back is the extra price on the heads which is still a win but there is also the HS rocker arm cost of the TF heads in addition.
 
Those are rebuilt stock heads by Indy vs the Edelbrock copy cat head. If you’d going to do an Edelbrock copy cat head, do these;

Shocker 185 Mopar CNC (Sold in Pairs) - PROMAXX Performance Products

Or step all the way up to Trick Flows. The draw back is the extra price on the heads which is still a win but there is also the HS rocker arm cost of the TF heads in addition.
Just curious, any possible bore clearance issue with the 2.08 intakes on the 4.030 inch bore? Probably not when keeping the lift under .500. That's one heck of a cylinder head, though...
 
I would use the 915s if they are fresh, on the flat tappet motor, cause tyou have em. I would wait for the sale, and get the cnc speedmasters, bare, for the roller motor.
I would not put a lot of money into (most!) iron heads. There are exceptions.
 
Just curious, any possible bore clearance issue with the 2.08 intakes on the 4.030 inch bore? Probably not when keeping the lift under .500. That's one heck of a cylinder head, though...
Clearance is fine, zero issues. I’m running very close to .600 lift.

I would use the 915s if they are fresh, on the flat tappet motor, cause tyou have em. I would wait for the sale, and get the cnc speedmasters, bare, for the roller motor.
I would not put a lot of money into (most!) iron heads. There are exceptions.
Yea, W2’s!
 
-
Back
Top