i need a recomendation for a 60212 BB hydroroller. 323/239 at .600 stock 049 heads. would like to get to 6200 rpm. ive been told everything from 330 over the nose to 415 over the nose ( seems that much pressure would collapse the lifter?) anyone have a suggestion and part #. thanks Dave

Sounds like the comp beehives 26120 would do the trick.

I am running the same cam and I had a thread about this a few weeks ago.I hope this helps.http://www.chevelles.com/forums/showthread.php?t=145477

I am running the same cam in my 454. I am using DelWest TI retainers and good valves with Comp 914 springs and it starts to float the valves and break up right at 6200.