Advice - Cab swap or motor/trans swap

[mccurrkm]

I am in the process of gathering parts for my build. I have an 85 Chevy c10 that was my first truck bought by my parents. It has sentimental value to me so I want to fix it up. I want to do a LS swap to get it back on the road. I bought an 86 with a 6.0 lq4 and 4l80e already installed and running. This truck is a project truck that still needs a lot of interior work and body work. The engine is already in and running and the drive shaft is done and has a posi traction rear end. I want all of this in my old truck. I may be having a garage finish the work for me since my time is limited.....would it be easier/cheaper to swap my cab/bed/front clip to this frame or should I pull both running gears out of each and swap them?