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I have a similar 318 build with 8.7-1 compression, 2.02 J heads, and I used the Comp Cams XE268 that has similar specs to yours. I installed it 4 degrees advanced and it has excellent low end performance. Out of steam by 5500 but that’s ok. Just make sure the valve springs are spec’d to the cam...

I’d install it 4 degrees advanced and send it.

^^^^THIS^^^^

The pistons in my 1974 318 were .100” deep. Seriously. Measured with a dial indicator and deck bridge.

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What type of fuel pump? Verify correct fuel pressure at the carb. My brother-in-law’s Maverick developed a pop in the exhaust and we tracked it down to a failing fuel pressure regulator. He was running an electric Holley pump.

You have 2 of the oval port intakes? Please think of me when you decide to part ways with one of them. I’ll come down from Clarion and chew the rag with you for a couple hours. :poke:

Unfortunately, yes. The 360-3 was on my Christmas list but Santa must’ve heard I’ve been an asshole. So no bueno’.

If it were me, I think I’d invest in the Indy intake because there is no way that thing is gonna run out of steam at 6k rpm. Unless of course that’s where you set the rev limiter. Sell the two intakes you have to recoup some of the cost….. oh who am I kidding? You own an R/T Challenger, I’m sure...

I would say go for it. Lots of meat on those W2 iron rockers.

I honestly can’t say that I have ever heard of anyone breaking any iron rocker arms.

Just to add to this discussion, here are pictures of said rockers side by side. W2 Econo on top, W2 bushed bottom Factory 273 with bushing added by RAS on top, aftermarket 273 (Isky?) unbushed bottom.

I love the cam choice. Just wish it was cut on a 106 LSA! :poke:

Hahaha, thanks John. I’ll take that as your approval. Remember, this is just a street driver.

I found a professional weld shop fairly local to me that supposedly has the ability and experience to make the necessary repairs. I will be dropping the wounded head off at their place in the next week or so. They said that they would like to bead blast it clean and mag the entire thing for...

Little update. I was able to source a single replacement head for the cracked one thanks to a VERY helpful member here on the board. He has been a huge help to me throughout this project and I don’t know how to thank him enough. I won’t name him but he’s free to take a bow if he chooses. As...

I milled a set of 360 heads .060” off the deck surface and .050” off the intake surface and gained a full point of compression on my 318. 74 motor with pistons near .100” below deck. Chambers went from 68cc to 57cc with 2.02/1.60 valves. Not worth the $$$ or hassle in hindsight.

Seems like this should be an easy theory to test using a dyno facility and a controlled environment. Only swapping pulleys between tests. Surely it has been done and proven one way or another.

Before. After we installed it in the car I was filling the cooling system and looked under the car and saw the dripping. Looked around and found coolant weeping from the crack. We hadn’t fired the engine yet.

Mine cracked here. And here…

Going through this trouble right now. One head cracked, the other didn’t. My brother is going to try to tig weld it with the new-ish “EZ Rod” tig rod. Then I might try to get some epoxy inside the water jacket where the crack is. I did buy a replacement from a member here because I don’t have...

422” W2, Solid Roller. 10.75-1, ‘70 340 block, Bloomer stroker kit.

W9 top end, 13-1 compression on e-85.

These are 810 castings but we milled the saddles off to run blocks. So basically they are “race heads” now. Open chamber for 59* block. I suppose I could look for either an econo head or a race head, just need to machine it accordingly. Also, mine oil the rockers through the deck. I’m just...

That’s exactly how I did it John. Set the head on the deck without a gasket and verified it was all the way down. I even checked it with my calipers to be 100% sure as I too had heard about the cracking problems.

I did verify. Twice. I suspect the cracks have been there since I bought the heads. Im wondering if they relaxed enough to pass the pressure test and when torqued down the crack opened up again. Either way, I think it’s junk.

Well, my world just came crashing down around me. Serious ******* heartbreak. I got the motor in and everything hooked up. I started adding coolant and and after adding a gallon and a half, I looked under the car and saw the dripping. The passenger side cylinder head has two cracks in it. One...

……in with the new.

Couple more pieces of the puzzle showed up last week. I spoke briefly with @weedburner (Grant) about clutches, flywheels, and his clutchtamer. I took his recommendation on the Ram clutch and he also suggested going with an aluminum flywheel, which is something I had been considering anyway. The...

:)