98 V6 into a 90?

My friend is in need of a new engine for his 90 Park Avenue, and I've found a seller of a 98 3.8 V6 online. I was wondering if it would be a straight swap, with no other parts needed? Thank you.

Nope, wiring harnesses are completely different, motor mounts are off slightly in the rear and the dog bone mounts are a different shape