i have a 1990 gxl. however my motor blew. ive got a working s4 motor sitting in my garage. will that work in my car. if so what do i need to be able to make it work.

 

if you use the just the S4 block and swap all the manifolds (modifing the LIM), use all the S5 accessorys, wiring, the front cover, flywheel, and MOP and get a block off plate for the EGR, a S4 motor can be made to work in a S5 car.