Cam ?

[Daves72'GMC]

I'm rebuilding my 402BB and I'm using standard size rings and bearings and going with the edelbrock 1411 750cfm and intake manifold. What is the origional size cam that came with my engine(duration and lift,etc?) and I want to use an edelbrock RV type cam and want more power,but don't want to go too big and don't want to have problems with idling and over heating and don't want to have to use a stall converter. What size edelbrock cam do I use? Thank you. Dave