Thanks, Grigg. I probably should have called you to start with. This is what I had determined a few weeks ago. Chevy offered the 4-53 (212 inches) and the 6-53 (318 inches) beginning in 1962. In '68 and '69 they offered a 3-53 and a DH478. Then beginning in 1970 they offered the 12V71. I have no idea what a DH478 engine is. Do you? Could it possibly be some other make than Detroit; like maybe Cummins?
The DH478 was a V-6 GMC gas engine converted to a diesel. . .
never heard of the 305-V6 351-V6 379-V6 401-V6 432-V6 478-V6 all gas engine's from 1960-74. . .I do beleive the 351 401 478 all could be gotten as a diesel some have said the 305-V6 was offered as marine diesel tho I haven't seen ay of them. . .
Mike D
