Carburetor Problems on 318 Engine

Stromberg carburetor on 318 engine with manual choke. I have installed a kit in it but it is still not correct. On a hot day it will leak fuel at the bottom gasket at intake manifold. I think it also suffers from vapor lock, however, often it is hard to start on a cold day after it has been warmed up. Is there a better carburetor on the market for this engine? Thanks!
Author: RKC