Recently, I've been running a 470 Holly Truck Avenger carb on top of an Offenhauser intake in my daily driven '71 Chevy C20 w/ 250ci and Muncie 4-speed (with the granny gear, so technically its like a 3-speed). At full throttle, the 4bbl's open, and the rpm's don't take off like they should - yeah, I overshot the carb for the stock engine.
I happened to pick up a Carter 2bbl (#4877S) at a local swap meet, and thought I'd pop this in place of the 470. What I could find about the carb is that its from a 61-64 Olds 394ci. I realize cfm ratings weren't posted until the early 70's, so here are my questions:
1. Any tech information about this carb? Book, website?
2. Ever try a 2bbl on a 4bbl Offy intake? (I'll be machining the baseplate instead of using a 2bbl adapter on top of the 4bbl Offy baseplate)
Thanks!
