Need to know what cars the motor and transmission out of a 1991 pontiac 6000 will fit in?

The 3.1 engine will fit directly: 91 6000 91-2 beretta 91-2 cavalier 91-2 corsica 91-2 grand prix 91-2 sunbird 91-2 tempest you can go back to 89 and up to 94 if you don't mind changing like intake/exhaust manifolds etc. The tranny is it a TH125 or TH440? TH125 fits directly: 90-1 6000 89-93 Century 89-93 Ciera TH440 fits directly: 90-1 6000 88-91 bonneville 90 Celebrity 88-91 Olds 88 88-90 Electra 88-91 Lesabre 88-90 Olds 98 88-90 Park Ave 88-90 Reatta 88-90 Riviera 88-90 Toronado

olds ciere,olds cutlass chev celebrity and of couse the 6000 any a body style gm car

your local junk yard should have this info