Marsh has them......... Race Roller UGL Camshafts 48° tappet “R” blocks (R1, R2, R3, R4) and 48° tappet aluminum blocks require special camshafts. These UGL (unground lobe) camshafts enable cam grinders to grind specific cam profiles to create a finished cam. Cannot be used in engine as-is. P5007437 Race UGL Camshaft — Roller Tappets, for 60 mm Roller Bearings P5007361 (“R” Blocks) 281.00
