[Batman]

I think they are all different, the one to get if you can find it is the factory LT4 cam (not the hotcam), but I am not a huge fan of putting in a used cam unless it has very very low miles. And I'd say you are wasting your time porting the inlet out unless you get to a real radical engine, the LT1 T/B can handle a mostly stock engine. I don't think you would see any benefit at all, in fact it may hurt your power levels