My self I am running a matched set of holley AA- 1 on a large port nicson on a mild GMC 302 with a cam, head work and dual exhaust it was a pain but got it to work.
I have a matching set of zenith 646087 10596A that are on a old gotha intake that he wants to run on a his GMC 270. My self I know very little about zenith carbs ! There in good shape but will need kits. He has a ellis intake he will be running. I will never use them so I was going to give them to him to help a fellow rodder out. I would like to see some one get some use out of them.

I know he will need to heat the intake to get it working but I know nothing about zenith carbs so can they be maid to work or are they just paper weights ? They have no adjustable main jet. I have never had them apart so I don't know main jet size. Can they be maid to work ?