The Boss 302 heads are the same as 3514v heads except for a smaller combustion chamber, and water port holes on the intake side of the head. filling the bottom of the intake port and working on the exhaust, and adding the stinger exhaust plates, gave me flow numbers of 325 @.700 lift on the intake, and 228 @700 lift on the exhaust, when we started, the flow numbers were in the 320's on the intake, but only 178 on the exhaust, in fact, if you put a piece of yarn on the bottom of the exhaust port, it would suck in and twirl because of the bad exhaust port design, that's why Roush cut the exhaust flange off and bolt one on that raised the exhaust port in pro stock. we filled the intake port just to the point where the flow stared to drop, witch was about 3/4 of an inch, and it increased the velocity. I run a real mild roller, its a Cleveland grind that comp camps says is easy on parts, because of its slow ramps, im sure I could pick up going to a more radical profile, but I don't really want to change valve springs halfway thru the season bracket racing it for a .10 or .20 I do plan on putting titanium intakes in the heads to lighten up the valvetrain. Duane just to add, the Boss 302 came out before 351C, it was built for Trans am racing to compete against the 302 Camaros, and the Cleveland came out a year later
Ok yeah I thought one year had bigger valves than the Cleveland which was a bit rediculous. What size are yours? (Your valves, LOL!)
