[kikkegek]

I know I am spamming this topic, but got a question for you guys.

I am swapping my TH400 with NP208 in my K20 Suburban for a TH700R4 with NP208. The 700 comes from a 87 K5 Blazer. The guy bought a 4L80E and transfercase from a 4x4 Suburban. He can offer me two types of driveshafts:
1. the front and rear driveshaft from the K5 Blazer that had the TH700R4 with NP208
or
2. the front driveshaft from the 4x4 Saburban that had the 4L80E with transfercase

what would be best? or can I just use my own driveshaft, since I also have a NP208 right now.