Just as slow as before mods..

Mattax said

Its a good demonstration of how little throttle opening is needed for basic everyday driving.

Click to expand...

There were some huge engines that were built with just a 2 barrel carburetor.
Didn't Buick, Olds or Pontiac put a 2 barrel on a 455? Our own Industrial 413 came with 2 barrel carburetors in HD trucks.