How hard to swap 72 blazer body for 1987 body

[theOnlyLuvshack]

I have a great 1972 Blazer body, but running gear is bad. Found a nice deal on an 1987 blazer with all upgraded running gear.

So i know i could just swap out the axels but with the TBI engine and other "upgrades" how hard would it be to swap out my body for the 87's?

I know the wheel base and length are different:

Wheel base:
72 -- 106
87 -- 014

Length
72 -- 177.5
87 -- 184.8

Thanks