both sound nifty.
also would need flywheel, I don't think that's standard. and starter of course. driveshaft work. direct top ratios struck me as more common.
not sure how you can tell ratios. I'm sure you've seen the eaton bible linked by now with how many options there were. The C70 sounds sweet, maybe resellable after a lil stripping or at least a BUNCH of scrap tonnage, bet 700ish or more with three axles.