Need some help with 350

[92GMCDriver]

sean 1969c10 hit it right on the head. i wasnt quite sure if it was the counterweights or the connecting rods that need more clearance. and as for a cam what do you have in mind? something very mild would probably work, but these motors are pretty fussy when it comes to little changes. id recommend going to tbichips.com ive heard nothing but good from them and they have tons of information on their site about what cam, heads etc...