750s and 780s....3310

[VintageMusclecar]

I can't think of any mechanical secondary carbs that were rated at 780 cfm. Not saying one doesn't exist, just that I'm not familiar with it.

[Xplantdad]

I'm thinking that if Eric's never heard of it...it probably doesn't exist...

[copo69]

I thought the difference was the 780's have a metering block with changeable jets on the secondary side and the 750's have a metering plate that has no changeable jets. I've got one of each, I'll have to look at the boosters.

[VintageMusclecar]

Greg;

The metering block denotes a 4150 style carb, while a metering plate denotes a 4160 style carb. A 4160 style carb can be converted to 4150 style simply by replacing the secondary metering plate with an appropriate metering block.

Eric