any major hassels installing a chevy small block into a trans-am both tpi 85 chev motor into 87 trans-am both automatics tom

 

None beyond the usual busted knuckles and so forth.

The Trans Am and the Z28 are IDENTICAL, except for some stickers and such. The motor in the TA is already a Chevy one.

 

thanks for your response, what i am doing is a guy at work has the trans am with no motor but all the wireing is there. the kid down the street blew up the trans in his 85 Z-28 i bought the car for extra parts for my 86 Z-28. the 85 motor is a 305 rebuilt 2 years ago all the cylinders are in the 95 compession range. what about the ecm and prom is guess the trans-am had a 350 will the ecm from the 85 z work? tom

 

They'll probably work OK at least, if not perfect.

Use the 305 injectors, or if they're not there, get a set of used stock later-model Mustang ones; the 4-hole ones, with the F0TE part number. You can pick those up all day long for $30-40 a set.