Quote:

any one know the rule of thumb when swapping carb parts.

such as what MB on what BASE result in a 950 cfm , 850 cfm , 750 cfm etc

thanks



A 950 is basically a 750 MB with an 850 base, But the bottom of the bores on the MB are opened too 1.3/4 to match the base, they share the same 1.3/8 ventury opening, the 750 is 1.11/16 on the bottom & matches the 1.11/16 base.

An 850 is 1.9/16 on the opening too 1.3/4 on a 1.3/4 base.

A 750 is 1.3/8 too 1.11/16 on a 1.11/16 base.

75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU