C6 or E4OD?
With a C6 I get a longer rear driveshaft which means angles will be better and more possible travel.
With an E4OD I get OD and a lower first gear, but lose some rear drive shaft length and rear travel numbers. The wiring is also all there, although down the road this will be made more complicated by a mass air conversion.
Also working on cruiser status so OD would be nice in general.