Thanks all for your replies. One of several issues to resolve on this car. I may wait and go with a Double-pumper. The short block was replaced back in the 70's so the car will never be VIN matching. Have been toying with the idea of dropping in a 460 SVO crate motor (Future).
So I could use a bigger carb now and use it on the other motor if that ever happens. A partial dissassembly would be necessary to figure out what shortblock is under there. (390 or 428) The original Cobra Jet heads are on this shortblock. Engine sound nice!!! Even with that lame small looking Autolite carb.
Thanks again... Dave