wat to do with 243 heads?

[chvy=power]

i bought them off yellowsierra02 for $450. well i sure dont wanna spend all my money on a set of heads thats gonna make me slower...

[chvy=power]

well from what i'v found approx. .0065" milled off the head will take off 1 cc. the 243 heads have a 64.45cc combustion chamber and the 862 heads have a 61.15cc combustion chamber. So after some math it looks like it would only take around .022'' of milling to get the 243 heads to the same compresssion ratio as the 862 heads

[PitchBlackC3]

Do all the newer 5.3s that have the 243s have flat tops or what's the deal there?

[oleshifty]

yes, the 5.3 HO have the 4.8 pistons. If my milled 862's don't do it for me, that will be the next upgrade

[chvy=power]

if i shaved the heads .030" will the intake bolt holes still line up??

[pl4yboy]

Yes...

PS, my 5.3 is the LMG with 9.9 CR and 243s.

[chvy=power]

and the intake runners will still line up with the intake ports on the heads after shaving the heads?? sorry about all the questions i'm kinda new to this and i'm trying to get all the info i can before i start spending a lot of money