I couldn't tell you. They are 250 miles away at the moment. I have a pic of the xram, but not anywhere near enough to read anything on the carb.
I have a pair of 3705s too, but there is literally NO numbers on them anywhere.
According to info I found , the chokeless 750 comp series should be 4762.
I have some very early ones without any numbers stamped on them also. The earlier correct 750's have a primary boost that is longer and places it at the correct height of the vena contractor so they flow.
After that Federal Mogul and Edelbrock made them with the shorter 600 booster. That's one of the reasons the 750 can have a stumble when going from transition to mains.
