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Q: Engine swap

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Hi, so I have a 1989 vandura gmc 2500 van and I want to swap out the engine with a more modern engine, who would I call and what changes would I have to make?

My car has 300000 miles.
My car has an automatic transmission.

The question would need to be more specific. When changing out a motor with a used motor is hard enough to get the same year engine to work correct. You want to change out to use a more modern motor would be very hard to do and would require major modifications to the vehicle electrical and electronics along with fit and function of engine. I would not recommend attempting a newer model motor and going with a same engine match.

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