Thanks for the comments. I'll try to purchase a holley 390. I had a holley on my other 65 chevy (small block). The secondaries hung up on the gasket that came with it and I had to turn the key off. Big back fire. I still have a "fine tuning holley" book.
I'd love to have a Carter 9400 like Carbking has but they are very hard to come by.
Thanks again.