Can you use the Holley 4 bbl teapot on the 56 ECZ_A intake with a 57 up non loadamatic dizzy if you plug the carb vacuum port going to the dizzy.Trying to keep costs down.
Its possible if you modify the carb. Very simple modification. If you are interested email me with your snail mail address and I will send you a copy of the modification.
Ted Eaton has a good article on how to do that: http://www.eatonbalancing.com/blog/...four-barrel-carb-for-late-model-distributors/
You don't "have to" use ported vacuum to run an engine with the later distributor. Could just limit the total vacuum advance, use manifold vacuum for the source - and tune it accordingly. Either method of applying vacuum signal to the dizzy works, it just takes heads up thinking..............