14ff are cheap and they are very easy to setup, There is also no need to have 4 shocks in the rear.
BigRed
14ff- $70 from barrys you pull it
Detroit- $350 PORC
5.38 gears- $120 PORC
Master install kit- $70 PORC
Hub rebuild kits- $80 PORC
Perches, Ubolts, plates, shock mounts- $120 Ruffstuff
Disk brake swap- $290 tangent design
POR15 paint- $50
SOLID diff cover-$90 pirate
pinion gaurd- $60 BTF
Total for BigRed's axle $1300
Blazers 14ff
14ff- FREE from Btassin on here
Diff cover- $25 Copperhead fab (diy)
Perches- $10 copperhead fab (diy)
shock mounts- $cost of metal (cut them out with my plasma)
Gears- running the 4.10s they came with
Locker- $free (made a spool out of the spiders)
Pinion gaurd- $30 Ballistic Fab (weld together)
Bisk brake brackets- $30 ballistic fab
Brakelines, rotors, calipers, pads-$117 from Napa (so $150 Into complete Disk swap)
1350to 1310 Ujoint- $16 (i had $25 summit bucks)
ORD SS rear brake line $40
Hub rebuild kits-$80 ebay
Total $348 for a built 14ff
It can be done for cheap, you just have to know what exactly you need. If your willing to pay I can build you either axle.