What are the practical limits to the stock Magnum Rocker package?

Ive been wondering the same thing. I am doing a magnum head swap and with my cam (voodoo 268) and 1.6 rockers, exhaust lift will be .548! The guildes have been cut down and It seems I have enough spring clearence, but not sure how much the stock magnum valvetrain can handle. I dont plan on spinning it past 6000. Ive been lookinga at replacing the voodoo with an oldschool comp 280 magnum that would put the lift at .512 which I feel is safer, but would really like the voodoo cam if I can make it work.