GMC53,
I think Bill has the right idea...hook them up, if they're bass-ackwards, swap them. With no turn signals, there are only the two wires. Your new taillight housing are made of metal and contain a single-dual filament lamp...right. If this isn't true, then more engineering would be necessary.
To go from one side to the other, merely 'T' the wires at the first light.
Stuart
