SBC MECH ROLLER CAM 47S 312R-8, 0.900" B/C
COMPETITION CAMS 12-821-14

CAMSHAFT 47S 312R-8 .900'' BASE CIRCLE

Drag Race, 47S 312R-8 4&7 SWAP

MECHANICAL ROLLER-400 c.i.+ engines, good heads, high compression, 0.900 base circle.