Member on here, ou812, Brian, sells custom SB roller lifters from Comp Cams that will drop in witout any clearance issues. They have pretty good shrouding over the roller wheel too. But if you have too much lift, there is NO lifter that will prevent you from having to tube the Block or install bushings in the lifter bores. But his will give you the best advantage.

Go here:

https://board.moparts.org/ubbthreads/show...part=1&vc=1