Use when installing M-6049-X306/X307 heads on M-6010-BOSS302 block NOTE: Check header to head stud and nut for clearance
M-6014-Z304 Use when installing M-6049-Z304/Z304A/ Z304D/Z304DA heads on a 351W block .500" diameter studs with 12 point nuts and hardened washersM-6014-Z304 Use when installing M-6049-Z304/Z304A/ Z304D/Z304DA heads on a 351W block .500" diameter studs with 12 point nuts and hardened washers.