73 360 question?

*I Think* the color isBlue, not a 100% on that.

I don't understand "Dome", but as far as a carb goes, the OE T-Q is preety good.

If you do not have a carb for it, a 600 - 650 cfm carb will do fine. Your carb can be a Holley or carter. Each are fine for street duty. I like the Carters myself for street duty rides. Jet'em, set'em forget'em.
AFB are 600 cfm, the AVS style is 650 cfm.
Holleys come in many styles. A basic 1850 (600 cfm) would work fine, a street Avenger @ 670 cfm would be great as well.