Q. Squarebody auto/203 into a 70 4x4 frame

[tutone]

Hey guys, I know it has been done but I'm asking anyway. Searched and cannot find a definite answer. I bought a t350/np203 to put in my build. Pulling a manual 4spd/np205 out. This trans came from a 79 Blazer and I got the crossmember with it. Here is the question. The 203 is married to the trans, unlike mine. Should the front driveshaft work from any squarebody? And will the crossmember set the case at the correct height in the earlier frame? Any experience in this? Thanks