I feel the easiest swap is 2wd blazer front brakes ( 98-03 ).
And 98-03 Fbody rear brakes. I believe the fronts make much more impact than the rears.
We did the fronts on my car in under 2 hours, had lunch then did the rears before supper. Although I had new balljoints and springs so it was literally a spindle swap.
HUGE difference in braking. I took a peek on car-part.com for the spindles any only seen a handful of sets on-line in Canada. Closest to you is a set in Calgary
98-03 F Body Rear brake assemblies $75 side at Southside in Weyburn