According to RockAuto dot com you have a Carter YF carb and not a Rochester UniJet. Need to verify tis by reading model numbers cast onto carb's body. Otherwise this rebuild kit should fit if carb is original:
Looks like Classic industries has what you need. In my catalog the carburetor will either be part number 1306 or 1307 depending on if you have an automatic or manual transmission. I can't find it doing a search on their site though, so you may need to call them.