[SunSoaked]

I'm preparing to swap the stock 350/208 setup in my 85 K20 with a 4500/205 setup I have. The only non- OEM parts I'm using is a long 32 spline input shaft and the AA adapter that's 1 5/8 thick. Also, the AA bellhousing and ORD twin sticks.
My question is concerning driveshaft lengths. Has anybody done this setup? I'm assuming I'll have to get a new rear shaft because it will be too short? Since the 205 doesn't have a slip yoke, I assume the driveshaft will need to be replaced with one that has a slip joint built into the shaft itself? I might also mention I'm running D60/14ff axles, if that matters.