920 heads - What Cam?

Thank you everyone for the advice!
For those who were asking, yes its a 4 barrel with a dual plane intake and 2" dual exhaust and factory manifolds. I'd really just like to just make it a little faster around town i'm not trying to race it or anything. I have no idea what cam is in it now but they guy i bought if from said it was probably the original one. He bought it from some guy though so who knows.