Actually, the GM 3.8 is the Buick 231. Same motor.
They came carburated, so the swap would be relatively easy. There is also a large aftermarket for them.
Retro-fitting a dodge engine would likely be problematic, but of course...anything is possible if you throw enough money at it, but I don't think changing to another manufacturers engine would pay for itself.
Chenging engines is also generally easier on a RWD car, even if you have to change the motor and trasmission, a custom driveshaft can be built to mate up to the rear end.
Jim
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