GM Cast Iron 4.3
Years in Production
4.3 GM V6 The bolt size is 8mm or 10mm /Early have studs some stud screw in. Heads come as fuel injected with holes with the same casting number
Casting # 245, 248, 268, 683, & 769 Early
Casting # 103, 890, 772, 181, 209, 256, 742, 113, & 064 Late
Casting # 53480, 55865, 051174, 1174, 88640, & 88840 Roller cam turbo
10077626
10144103
10144115
10238181
10240209
12557113
12558114
14079245
14079248
4079268
14079269
14084768
14093683
14094066
14094768
14099064
14099067
14099070
14131996