4x4 conversion??

[bigblocksean]

Greetings all, Iam seeking some advice about a project Iam planning, I have a very solid, clean 70 Custom Camper 20 2wd, Iam wanting to convert it to 4x4 and have an 85 3/4 ton 4x4 frame and running gear, My question is would it be easier to convert the 70 frame to 4x4 (have a blazer complete 4x4 frame as well) or do a body swap onto the 85 frame? I have done many lwb to swb conversions on 2wd trucks, and am a welder by trade, your thoughts?? thanks