69/70 FMX -> C4 Swap

So it's come to a point where I'm making too much power for my small stall converterter. Instead of just getting a custom converter for my FMX I'm going to go with a fully rollerized, reverse manual valvebody C4 Trans with a brake and 4000 stall converter.

i'd like suggestions, as well as what is entailed aside from: Converter, Bellhousing Trans. What linkages do I need? Any chance of using a stock appearing shifter? (My interior is almost 100 percent stock appearing). What about crossmember, driveshaft length? Any ideas on flywheel?

THANKS guys!

So my 70 flywheel is a 10 1/2 inch 164 tooth deal?

And any decent crossmembers made? It's gonna have a lot of torque, I don't want to break a stock stamped steel.

Are the yokes the same?

Thanks guys