converting 340 to EFI is Edlebrock the best solution?

It sounds like the sniper would be a good option for you. Your fuel system would have to change, and you will have some setup to do but they are pretty straight forward. FWIW some of these TBI fuel injection systems do not like to run on certain dual plane intakes. Worth doing a little research on before buying. Holley has good tech support as well as a good forum. And there are a few members here with some experience with them that are willing to help out.
Thanks. I've been reading about this system concerning my intake. If there's room under the hood I can use a spacer. Otherwise I'll have to cut out a little of the plenum spacer.