Quote:
Originally Posted by Tim Corcoran
I will be re-using the same E-Heads I had on the 455 that was destroyed at Norwalk. These are 330 CFM heads done by Dave at SD Performance back in 2007. I have them stripped down and I removed all the carbon and scale from the ports (lots of work) and I will have them milled about .020 to get the compression to around 12.3. I checked the springs, they are still good so will re-use them. I removed all the carbon from the valves using a wire wheel they cleaned up pretty fast. There were a few bent valves that I have replacements for but the valve job looks really good so I will install new valve seals, lap in the valves and re-shim the springs and that should be it for the heads.
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Since you're running race gas, mill the heads and get compression up to 13.5-14. Might as well make running race worthwhile.