I have found that they are subject to boil over and hard starting on a hot engine. A plastic/phenolic spacer will help. You also have to match the fuel pump pressure with the carb. They have a disclaimer about fuel pressure and flooding that comes packaged with the carb.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine