Here's a link to Mark's website, QuadrajetPower, that shows what your carb is for (appears to be correct).
http://quadrajetpower.com/chevrolet-...rajet-7042210/
One thing to check before you buy a kit is to open the secondary air valve (the big flaps) and make certain that the metering rods come up when you do so. You will probably have to force the choke plate open gently to get the secondary lockout to disengage. In fact, given the age of your carburetor, I'd recommend getting that little nylon cam to replace the old one, anyway. I'd really recommend getting one of the books available on rebuilding Q-Jets. There are a few nuances that you will get that will give you the best end result, and will be well worth the $20 or however much it costs.