[ivymike1031]

fair enough. I was sorta hoping that you'd challenge me to come up with an exhaustive list (I'm not entirely sure I could do it, but I think I could come close). I must just like to read my own writing on the internet or something.

One obvious thing about cam selection vs valve spring selection that hasn't come forward in this thread yet would be the issue of solid clearance - if you have a valve spring design that gives a desired (small) solid clearance at max lift, and you increase max lift, there's a chance that you'll "go solid" before you get to max lift... that'd be a problem. Not that this means that you have to get the same brand cam & springs, you just have to keep in mind the intended specs of the NEW system when you're picking parts. (which is what you've been saying all along, of course)

I suppose that I might add that "valve bounce" is not as likely to be caused by improper spring selection as by excessive valvetrain vibration. I think what you were probably meaning to say is "valve float." (At least if we're giving the same meanings to the terms)

I call "valve bounce" the situation where the valve closes, then "bounces" open again (actually pushed open by vibrating valvetrain components)

I've heard of valvetrain separation (where the components at the various interfaces lose contact with each other, such as cam-follower, pushrod-lifter, etc) referred to as "valve float," but I prefer to call this behavior "separation."