G.U.2.8 to 4.2 conversion

[jman69]

Can someone give me an idea of what is involved in a swap of this kind? I know the diff centres will need to change, but can i use the same gearbox for example? Will the exhaust bolt up easily etc.?
Thanks in advance.

[PeeBee]

Nope, bigger box required, different universals also I believe, same transfer case but different adapter flange, different clutch assy including slave.no doubt a heap of other stuff, probably radiator??, alternator different as 2.8 has the rocker cover mounted vac pump, would think the exhaust will be different as well. there are a few guys on here who have done it i am sure, do a search as well

[jman69]

Thanks Pee Bee. I thought it would be that way? Guess i'll talk to the mechanic and see what happens.

[Rossco]

What about engine mounts they the same or need to be moved.?

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[PeeBee]

Engine mounts bigger and in different location, go from 2 bolt on 2.8 to 4 bolt, gearbox and transfer case stay the same I believe, but cross member moves down a hole or two from memory