Thanx for all the info. Im not actually putting larger valves in my heads, I have a set of Brodix aluminum heads that already have the 2.08, 1.60 valves that I am putting on my 400. Would I benefit If I had the top the cylinder bore relieved around the intake valves for more clearance,(like the 396 you explained), or would I be fine with the way it is?
Thank you for clearing up that bigger valves are better. I was all confused for a little bit there.