I own a 1987 Pontiac Trans AM GTA how can I tell if it has a L98 350????

 

If the motor is original, run the vin that should give you an idea of what motor you have.

 

Look behind the heads on the bell housing part of the engine block, I forget wich side but it will have 5.7 in large letters. Then check the intake manifold the center 2 bolts on either side will be at a diferent angle then the rest. And the tpi intake, and if you have a automatic pretty much would have to be a l98.