Thx, but EGR is the reason why I can't fit those manifolds b/t the rails.

Appreciate the offer. Found a buddy close by who gave me a set of 6L mans (no EGR/AIR). If you have a cutting torch, that'd be good. MY C10's frame rails don't bend outward as wide as the NBS trucks. The new motor fits tight, but is in firm. Notching will take care of my issues. Thanks, again!