Ideal Dual-Carb FE setup for a street 390/FE?

[Woodz428]

According to the NV SAAC site, those were used on some S/C and later 3000 series cars. They are 710 according to their site, so 715 is almost the same. The secondary is a 3300, you may have read the stamping incorrectly, they can be a little crude at times. Learned something new, now I can back to sleep :-)
Just a note regarding the throttle bores, if you are referring to the butterfly openings...they aren't what determines the CFM, it's the body venturi. More than one CFM carb uses the same baseplate, when examining look down the venturis to compare size.

[69boss429]

Originally Posted by Woodz428

According to the NV SAAC site, those were used on some S/C and later 3000 series cars. They are 710 according to their site, so 715 is almost the same. The secondary is a 3300, you may have read the stamping incorrectly, they can be a little crude at times. Learned something new, now I can back to sleep :-)
Just a note regarding the throttle bores, if you are referring to the butterfly openings...they aren't what determines the CFM, it's the body venturi. More than one CFM carb uses the same baseplate, when examining look down the venturis to compare size.

Old eyes maybe don't see those little numbers as well,but since these are the rerelease Holleys they may have gotten it wrong.I'll look again.
And,they work very well,does not seem to be overcarbed and throttle response is awesome.
I made only 2 jet changes to get them dialed in,and didn't touch the vaccum secondary spring
P.S. Carls has more than one dual 4 bbl setup avail for big or small block use