Head question

I'm currently running a 512 with stock cj iron heads around 13 to 1 comp how much would I gain with the trick flow powerport 325 heads or would I b better to have my cjs worked I'm currently turning 7000 rpms and would like to gain 7 to 800 rpms any info would b greatly appreciated

I think you will need a cam change to pick up that much RPM. I think Brett Powell is the guy to see on the CJ heads, it seems like he was getting 900HP from them if I remember correctly?

MAD MEDICINE wrote:I'm currently running a 512 with stock cj iron heads around 13 to 1 comp how much would I gain with the trick flow powerport 325 heads or would I b better to have my cjs worked I'm currently turning 7000 rpms and would like to gain 7 to 800 rpms any info would b greatly appreciated

Modify the intake manifold to get the end runners shorter along with a correct camshaft...