Cusser
+1y
Likely because the Webers with electric choke are sol available and comparable in price, with no need to route a cable through dashboard (or underneath) to the carb.
I will say that in the early 1980s Mrs. Cusser #1 had a 1975 Chevy Luv, and when its carb died I did install a Weber kit that did take a manual choke cable, and it did work fine.