If I pull the eng on my 87 tII and put a 91 tII eng in its place will it work If I use all of the 87 stuff, turbo , trans ect.

 

use the 91 turbo and exhuast manifold.

but EVERYTHING else has to be swaped over. intake manifolds, injectors, fuel rails, vac rack etc.

also the OMP will not work. you will either have to block it off and run pre mix. or remove the pump and front engine cover. and swap the 87 stuff on.