Is there any advantage to running the 1.88 - 1.6 valves on the 302 heads? Once again I'm getting a lot of conflicting information. Bigger valves slowing velocity? Only the exhaust? Bigger = better? Valve shrouding? Would really like to hear from somebody with some personal experience. 318, 30 over, kb167 pistons, xe268h cam, Holley 570, 302 heads and a few other goodies. Have a second set of heads that I was thinking about the valves and maybe port matching my performer intake. Never done any porting so I'm not even sure about that.