Holley 1945 Rebuild

The '74 Holley had something like a 58 jet in there, which is terribly lean. Everyone says the '74 carb is garbage, but I made it work with a 63 or so jet. My NOS carb is from a '75-'80 model, and it came with a 621 jet (which is a 62 on the small side according to literature). I changed that to a 63, but it ran pretty good on the 62. A 62 or a 63 would probably be your best bet. I drive my wagon in colder weather, and I have used my wideband O2 sensor on it, so I followed the numbers and the seat of my pants to come up with the best jetting.