I’m sure there’s dozens of threads with this same subject, but each engine and application is different. I have built more engines than I care to recollect, all types, but I haven’t built very many 455 Buicks. My engine is .030 and is going to have right at 10.0:1 compression. I plan on running a B4B intake and headers with a nice free-flowing exhaust. The car its going in is a ‘66 Skylark with an automatic. I’m not opposed to running a looser converter and changing the gear (car has 2.73’s now, thinking about a 3.36). I want to be right around .500” lift because I’m not interested in too many costly valvetrain modifications. The heads are stock closed chamber castings that have had the ports cleaned up, nothing major. I want it to sound good - nasty - and pull like a mf’r from mid to upper range. There’s just so many grinds and so many that are very close together that I can’t decide. I don’t have enough experience with these engines to know what they like best. Any help is much appreciated.