I've got the 2bbl Holly-Weber and can say it is very reliable. And it doesn't leak. The motor usually starts on 1st try. Maybe 2nd in winter with choke pulled. you can get electric, water, or manual choke. I asked for manual but got water. It came broke but since I wanted manual I just took it off and twiddled bits until I got it hooked up. I don't really like the looks of it but it does work well.

40 Chevy 1/2 ton