340x vs. Edelbrock aluminum heads.

daredevil said

wITH HIGHER COMPRESSION THE EDDYS WILL OFFER MORE RESISTANCE TO DETONATION ON PUMP GAS 10 TO 1 OR HIGHER

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I ran a 360 with the Edel. heads and a KB107+.030. The zero deck piston and a .039 Felp_Pro gasket made for a good squeeze and the closed chambered head added a very good quenched area. I don not remember where I layed the inital timing, but it did run on 93 octane without a problem. It didn't like the open chambered J's as much.

With this set up, the Edel. heads worked better. (Also flowed better) The stock port iron 2.02 J head did run well, but timing and fuel had to be just so. No "Joe Cheapo's 93 octane on sale" Fuel.

abodyjoe said

thats what i'm running except its the 9 1/2 to one short block,6077 eddy heads , performer rpm intake and proform 750 dp. with a 904 and 3:91 gear.. and a 26x9.5 tire i have been a best of 12.17.

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My exper. with the shortblock was poor machine work and you were better off with the 9.5-1 since mine had an ill machined deck where the pistons went from cylinder #1 @ .010 positive deck and as the pistons on that bank went back ending at #7 @ .012 positive.

Edelbrocks closed chambered heads will not like that pistons slapping the $h!t out of them. Believe it or not, I used a Fel-Pro gasket @ .54 on one side and a .039 on the passenger side. Passenger side was a perfect zero deck across the bank.

Both engines were in my '73 Cuda 4spd w/4.10's. Carter 750 cfm RPM air-gap and Super Comps by hooker ending in 2-1/2 H piped exhaust. The first engine described ran a verity of cams, but not the 292/.509 purple and I did n't have the J's on the MP shortblock.
(Weird huh? I got all this stuff and never made it through the possible combos.)