1/2 ton to 3/4 ton????????

[bad_turbo]

I have a '67 1/2 ton burb 4x4 all stock. Really wish it was a 3/4 ton. I just picked up a '68 GMC 3/4 ton 4x4 truck. It looks to have a 4 inch lift on it. Was thinking about taking parts off the truck for my burb. Would the lift kit and axles swap without too many headaches? I measured the leafsprings and the lengths were the same. The only difference I found was the front leafs on my stock burb were narrower in the middle than on the ends and the leafs on the truck were the same width the whole length of the spring. What exactly is a shackle flip, also? Thanks