OK carburetor guys need advice. I am running a stock 283/ TH350 with a 2:73 rear end in my 49 sub. The 283 is a fresh rebuild and is an early 60s or late 50s fitted with a 4 BBL manifold. What carb do I use? I will occasionally be pulling an 18' camper. I have looked at most of the catalogs and the number of carburetors offered is staggering. I am completely confused as to what to look for. Thanks. Weeds.