Lets look at this. SAS swap-how much it will cost about.
usable straight axle = $250 about 250
cross member with spring mounts- home made = $70 about 70
shocks = $80 about 80
springs = anyware from free to above $200 200
driveline = anyware from free to $200 200
shackles = $50 about 50
steering - highsteer = $400 about 400
bolts = $20 about 20
1270 about
Well less then 2 grand of done buy yourself. All prices are approximate.
Or you could use straight axle conversion kits and still be less then $1500.