Thanks guys for your replys and the nice picture. Looks like it should fit.

Camino, Yeah I have a 4777-7 (650 CFM) on an Edelbrock RPM on the Nomad now.

Doing an upgrade on the 355 cu:

New Trick Flow 195 aluminum Heads
Edelbrock Air gap manifold (Durashine)
Hydrolic roller cam (not purchased yet) looking at the Comp 276HR
Larger 750 carb (subject of this post)
RPM stainless Roller rockers

This is mostly a show car (56 nomad) but being an old racer from the 60's,
this thing has got to run pretty strong.