turbodave231
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- Joined
- May 24, 2001
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Building a 427 using an LSX block (4.125 x 4.000). Already have the block Callies crank, Howard Rods, Diamond pistons. Looking to make 1000 RWHP.
I need to choose the heads. GMPP makes 2 versions of 6 bolt heads: LS3 and LS7, both are square port heads with slightly different port config. I need to stay right around 70cc combustion chamber size
I have ruled out the GMPP Race versions of the LSX head.....too much $ and needs expensive valvetrain parts. Plus I've heard about casting problems on these heads too.
Are there any other choices? If not, what are the advantages/disadvantages of the two choices above?
I need to choose the heads. GMPP makes 2 versions of 6 bolt heads: LS3 and LS7, both are square port heads with slightly different port config. I need to stay right around 70cc combustion chamber size
I have ruled out the GMPP Race versions of the LSX head.....too much $ and needs expensive valvetrain parts. Plus I've heard about casting problems on these heads too.
Are there any other choices? If not, what are the advantages/disadvantages of the two choices above?