keep those wide 5's. they're sweet. sounds like 37-38, you should be able to get 39 juice backing plates and keep the drums and spindle too. hell i'd keep the rear end if your running a flathead. snap a couple picks of the cable brakes for me, if you haven't taken 'em apart yet. please, please, the part where the cables connect and pedal setup.
Is there anything cooler looking than a 39-40, dropped in the front and minus the hood? It's a natural hot rod.