If you want to keep the Holley 4000 teapot carb, here is a link from Ted Eaton on how to convert the Holley 4000 to ported vacuum for a '57 and later distributor. I agree it's best to get one for a later 292 like '62 -'64 truck since they were better designed.
Sal
http://www.eatonbalancing.com/blog/2...-distributors/