HowdyAgain:
Opps! I left out the cfm on the '62 Holley #1908. It was rated at 125 CFM.
FomoCo chose these carbs because they represented the best USA technology for MPG efficiency at that time. Remember, this was the era before automatic chokes were standard equipment, gas was $.29, and regular had an octane rating of about 95. Premium at 103 octane was avaiable everywhere.
Autolites 1100s were rated at 130 cfm on 144 engines, 156 on 170 engines and 185 on 200 engines with the biggest internal change being the removable venturi. They were also jetted and plumbed for each different application.
Three Holley's with their glass, side mounted fuel bowls, are my favorites on an Offy 3 x 1s conversion. Set up right and utilizing the progressive linkage they got great mileage too.
I think it's ironic that when FoMoCo finally woke up to two stage , two barrels they became standard on a 4 cylinder of about 140 cubic inches and never applied it to the venerable inline six. They would have gottem better mileage and better performance. Go figure!
Adios, David
2 H/W on a log manifold are something someone needs to explore.
Adios, David