Don't remember what Holley called that carb, but there was a lot of reasons they quit making it---none of them good!!!! Think it was called an Economizer or something like that, anyway IMO they were junk. I say get a 600 Edelbrock and set that Holley on a fence post next time you want to do some target shooting!!!!

Neat old Nash and it looks like you have a really 1st rate assistant for the build!!!!!