Well, Lexus engines today also says Toyota on them...but early on Pontiac was a separate company from Chevrolet , later bought up by GM...and they eventually 'lost' the pontiac engines in favor of 'streamlining'... Cougar (Mercury) and Mustang (Ford) both owned by Ford are considered 'cousins' too, I think they started using same products within Ford earlier than GM... Volvo still says Volvo on it , owned by Ford.... but thats neither here nor there...I think you`ll get a better motor out of a Pontiac than the Chevy, just for the torque....Chevys are cheaper to build , sure , but....since its a Pontiac , I think if you have the option to keep the torquier motor vs a cheaper....mmmmm, I think the torque would weigh in better...just my humble opinion ( and thats just what it is , an opinion)
you should do what you like , its your car , and you are the one who`ll enjoy it!
