Hello I have a 1990 4x4 dodge ram with a 3.9 v6. With a 4 spd manual transmission with a granny gear 1st the v6 has blown up and wanted to see what was involved or needed to swap from v6 to v8. Or if possible thanks for your help
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i am not sure about the motor mounts. on the 2wd trucks you need a special motor mount extension plate on the drivers side to stick a v8 where a v6 was. don't know if 4x4 are the same or not. i think you may also want to try finding a v8 wiring harness and computer. it may run with the v6 wiring harness and computer but i think the v8 has an extra sensor on the throttle body that the v6 does not.
The computer changes, the wiring can stay,fuel pump stays,the radiator will work(the shroud won't) the mounts will work on a 318 the drivers side changes with a 360 or use spacers to use ityoure gonna need a v8, a wiring harness, motor mounts, probably a radiator, maybe a fuel pump... the conversion isn't for the lighthearted
So I won't need the v8 harness. ?[/QUOTE
The TBI is all the same some times you have to lengthen the temp sensor wires
It'll run with a V6 ecm but the timing is way off