Building quite a few SBC abd BBC's for roundy round and drag. in the 7200 rpm range over 40 years with hyd lifters. Yes Steve. Never saw a "lifter" float but springs will.
Same deal with Pontiacs. Springs, springs, springs.
If I hear one more response about lifter weight of the hyd roller lifter, I'm gonna puke.
I posted the difference awhile back.
I'd worry more about valvetrain load going to a 1.65 ratio before i worry about lifter weight difference of a 6200 rpm Pontiac engine.
But people can ASSUME whatever they want as to what works and what doesn't. Ya want a solid lifter on a hyd roller cam. go for it. Just more load on the valvetrain with higher rated springs for 'long term' mileage & relatively mild camshafts.