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I'll start an argument by saying you would probaly want a larger (195cc ) head to compliment the HSR on a 383.
Define "mild cam"
Thats ok... I expected that on the first reply it would be recommend to use a 195cc head. But for now I'm only use the 180, since thats what I have.
My spec card is no longer available online since crane is gone. But what I have is a Powermax 2040 Flat Tappet.
Duration I think was somewhere's around 223-226 and my total lift with the 1.6 rr's is about .477.
I'm gonna search for this spec card. I'm absolutely certain though I'm gonna change this out to a Roller retrofit. Comp 268HR-13 , i think is the number.
Let me add to that my last runs with my present setup was 13.3 @ 99, honestly I liked to be in the 12's with this car
Bottom line I'm only looking for 400 at the flywheel. Its either I'm gonna build the 383 or stick with going .30 over on my extra block I have. But if I use the block I have I'm gonna have to run a higher compression I think to get to where I want to be.