Quote:
Originally Posted by MAStuart
RPM's site still has them listed but trying to get one might be a different story. I am not sure what Mike gets to run his cnc program on a set of 65 289 heads . I have read that they were in the 230 CFM range with plenty of port wall left. He also stated that the race ported C6FE heads were good for another 20 HP over the 289 heads . Now if the price of the C6FE heads as posted in one of the above post is true I am not so sure that if a very good value other that bragging rights about how much your heads cost. But then again I dont have deep pockets. I have holes in mine!
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I wouldn't be concerned about the port wall thickness, I'd be concerned about the port volume. A hogged out port, even if it flows a lot, would make for a slugglish 289 on the street. On the race course, it would take a bit of rpm to make it efficient.