ok so I have a 94 3.4l with a 4speed auto and I want to put a 96 4.3 vortec into it. I would like to know what all I have to do. Im thinking change out the engine harness and maybe the motor mounts I believe it will bolt up to my tranny thats in it but could be wrong. Any help would be great thanks.

 

The 4.3 is a small block 350, with two cylinders missing. No, it won't bolt up to your trans. You may find other fitment problems below as you would if it were a 350, except for the overall length not being an issue.

 

damn that figures well its v8 time then. thanks much