452 heads cc's

RustyRatRod said
Actually, Jim Laroy and his son Cody found there are some differences. In fact, I've seen Jim say the ports on the 452s are a smidge better than the 906s. "I guess" if you're gettin down to the nitty gritty you would want the 452s, but for the vast majority, they only real difference is the "hardened" seats. I use quotation marks, because induction hardening is good for the original valve job.....sorta. lol

Rusty I've also heard exactly that. On the other hand I was over helping Nick @ Nick's garage and he found 906 to be a bit better, tried 346 and they were identical. Goes to show that aside from the hardened seats which we all know go away after 1st valve job they are very close to one another. Thanks