Last one to post in this thread wins!

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Bodyperson said:
Ya, that stinks not knowing what the PO did. Maybe he hacked up the ports in the heads too. That can kill some serious power. Whats the set-up? You probably already told us but... Exhaust can really slow things down too.
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Stock 360 block and heads, 74 vintage, 50k miles, came out of mini motorhome, or at least that's what I was told. I went through the shortblock, all bearing clearances are good, put in a new high volume oil pump, has 80 psi cold, and 35 hot idling, 70 psi under full throttle acceleration, Melling cam, .444/.466 int/exh, 288/298 duration @.050, installed straight up, new double roller chain, currently has a borrowed 4 bbl cast iron intake, I finally got my Wieand action plus from Montana last week after 20 months stuck in covid jail but have not installed it yet. Trans is a 727 with unknown convertor, rear end is 8.25 sure grip with 4.10 gears. I have TTi step headers, 2.5 inch exhaust with Flowmaster 40s dumping at the diff. I have never used MSD components before this, but I have also tried running the OE Mopar ignition system too.
Cranking compression is 125 to 135 psi across all 8.
 
missing linc said:
Stock 360 block and heads, 74 vintage, 50k miles, came out of mini motorhome, or at least that's what I was told. I went through the shortblock, all bearing clearances are good, put in a new high volume oil pump, has 80 psi cold, and 35 hot idling, 70 psi under full throttle acceleration, Melling cam, .444/.466 int/exh, 288/298 duration @.050, installed straight up, new double roller chain, currently has a borrowed 4 bbl cast iron intake, I finally got my Wieand action plus from Montana last week after 20 months stuck in covid jail but have not installed it yet. Trans is a 727 with unknown convertor, rear end is 8.25 sure grip with 4.10 gears. I have TTi step headers, 2.5 inch exhaust with Flowmaster 40s dumping at the diff. I have never used MSD components before this, but I have also tried running the OE Mopar ignition system too.
Cranking compression is 125 to 135 psi across all 8.
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That compression could be better. You might be on to something about dialing in the cam.
 
I think that will be my next step, been reading up on degreeing the cam, so I will see about doing that in the next week or two. It does run and I have driven it some, but it ain't anywhere near what the 360 in my last Dart was, that thing screamed, even with 3.23 gears in the 8.75 it would smoke the tires for 100 to 200 feet easy. Same basic build, except that one was bored .040 over, but had the smogger heads with the small exhaust ports and the air holes, plugged of course. I had an Air Gap intake and 750 Performer carb on that one, TTi headers with full 3 inch exhaust and a 727 trans with 2200 stall convertor.
Even my first Dart with a .030 over 318 and J heads with stock exhaust manifolds would smoke this thing.
 
Fred Scigliano said:
You know more about that than me but I see the rocker cleaning you did and looks like you have a long way to go but well worth the effort.
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That one rocker didnt take but maybe five minutes. A lot softer than I expected. The wear isn't as bad as it looks. Cant even feel it with your finger. Well, most of them anyway.
The sweep looks big because they rockers were used on 2 different engines with different geometry. I'll need to get them on the short block to know the real story.
 
Fred Scigliano said:
That's amazing no rain in that long of time for you guys.
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Went to our son's on Thurs. Went to the stock car races on Sat.and wanted to see the Crazy Train especially. They had about 5 races and then the sky opened up with thunder and lightning. It was coming down so hard there was a currant going around the big drain. So eventually they cancelled the rest of the races and we headed home. Was a fun night anyway
 
Bodyperson said:
They LOOK really good. I have them sitting on the bench with the 273 valve train on them. I am checking fitment and have good clearance.
The old 273 rockers have some uneven wear and it seems they hit the valve the same way on these heads too so in my book that's a good thing because that means they are the same as the factory LA heads and that it the rockers that are cattywompas.
I'm using dye to check how they hit. I have filed and polished one rocker with good success. It hits good and square now. Just 15 to go.
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I use the 273 mechanical rockers myself as I run a flat tappet cam. The stock push rods are too short you’ll need to use after market. Have 894 casting heads with deep dish retainers. 540/560 lift 326 degrees duration. Have no problem with clearance on anything.
 
Ahoey said:
I use the 273 mechanical rockers myself as I run a flat tappet cam. The stock push rods are too short you’ll need to use after market. Have 894 casting heads with deep dish retainers. 540/560 lift 326 degrees duration. Have no problem with clearance on anything.
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Ya, I learned that one the hard way. Well not too hard but some dumb choices to make it work. Anyway I think I have the correct pushrods this time around. Actually, I think stock TA pushrods would work.
 
Bodyperson said:
Ya, I learned that one the hard way. Well not too hard but some dumb choices to make it work. Anyway I think I have the correct pushrods this time around. Actually, I think stock TA pushrods would work.
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Slant 6 adjusting screws will work also but screws up geometry. They’ll wear out quick
 
Bodyperson said:
Ya, I learned that one the hard way. Well not too hard but some dumb choices to make it work. Anyway I think I have the correct pushrods this time around. Actually, I think stock TA pushrods would work.
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My pal made a push rod measuring device took old rod cut apart and brazed in threaded rod. Put it in thread it in or out till you get correct distance and viola
 
Ahoey said:
Direct Connection use to sell adjustable rods cut to fit and push in tip.
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Back in the bad old days we used to scavenge slant 6 pushrods, pull the end off, cut to the length we needed, and press the end back in. Cheap and effective.
 
Professor Fate said:
Back in the bad old days we used to scavenge slant 6 pushrods, pull the end off, cut to the length we needed, and press the end back in. Cheap and effective.
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Good tip thanks I’ll write that one down in my dart book That’s for sure. But probably wouldn’t handle high spring pressure’s would they. There 5/16 no?
 
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