V8 Swap...What should i do about the driveshaft

[JohnnyOcean]

i have a 67 c-10 swb and i am swapping in a 350/ th400 out of a 72 gmc long wheel base........was there a short wheel base with this set up so that i can just buy a used drive shaft?......do i have to have a driveshaft made?....can the driveshaft out of the 72 be shortened?...if so do i still use the carrier bearing out of the 72?

Any help would be greatly appreciated...i'm new to this board and c10's