If this is true, the how come I am able to use a stock head gasket, 7.4 pushrods, on a cam with the stack base circle???? I don't think they are milled much if any..

 

i'm still searching man, i'm not trying to prove anyone wrong either. i'm trying to figure out if i got shafted or not.

 

That is what I am concerned about. I want everyone to know what they are buying. They are good heads and they made a huge difference. I think it is up to the individual to do the math. I personally screwed up, but in the end I will make more hp and have better ET's.

 

The dish on the 5.3 piston may be +7cc.

 

Oh ok, but just make sure. That will not put you at 10.75 though.

 

I know. I think LM7 specs are somewhere on the net. Anyone know?

 

the LM7, L59, LM4 are 9.5cr and the L33 is 9.9:1cr

 

what do you think then? should i sell the heads or keep on keeping on..(?)

 

What about deck height and piston dish?

 

I put them on my truck with the 228R and it runs good up top. I would guess an easy 350 rwhp.