I seem to read as many complaints on forums about roller cams and lifters as I do flat tappets. So much crap out there today. Personally, I don't know which way I would go today if I were doing a project. Good luck!  You can't use cheap roller lifters. There are chinese lifter sets on ebay for les than $300.  Not everyone needs a set of $1300 Isky lifters, but you have to use decent stuff. Not to mention, used roller lifters are about the same as used aluminum rods...they're all advertised as having dyno time only, lol.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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