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Can you put a 3400 engine in a car that has a 3.1L. I found a 3400 3.4 sfi engine and trans for my 89 Cutlass Supreme and it come with the wiring harness ecm etc. What will I need to do to put it in?
Wiki User
∙ 15y ago
It should bolt right in as the 3.4 is the same block as the 3.1 and as long as you have the wiring harness and computer your all set.
Wiki User
∙ 15y ago
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