[Mike Taylor 3601]

You just said stocker build?
Unless I have missed something a spread bore holley would'nt be legal on a stocker,you would have to use the autolite on the spread bore ford intake.BTW if need to know mech secondary spread bore is easier to tune,is very hard to get smooth secondary opening on vac secondary,due to large butterflies and no accelerator pump

Carguy49
Spread bores are still in catalog and in price list from performance warehouse I use
Mike Taylor 3601