With that setup I would want to use glasspack mufflers,maybe CherryBombs. they might be a little loud,depending on what level of exhaust noise you want.Also a set of turbo mufflers would be a little more quiet and give you a nice rumble.On my 65 with the Caddy engine I am running turbos and they just give the truck a nice powerful sound.On my 55 with a 350 SB I am running flowmasters ,also not too loud but a nice rumble,especially at idle.
