SpeedMaster high performancr heavy duty balancer 12 pt bolt with thick 1-3/4 washer black oxide coated
for sb chevys 283 ,262,265,397,327,350 and 400 chevy
inline 6 including 194 ,230 250 and 292 truck engines
chevy v-6 200 ,229 / chevy 3.8 and 262 / 4.3 liter
153 4 cylinder
not all engines are drilled for this bolt
thread size is 7/16 -20
# 292.1001