Project: "A Body Jr" - 1975 Dodge Colt
well since you are going to the 5x4.5 bolt pattern 8.75 rear may I suggest, gasp!, SN95 mustang stuff up front. It has the same bolt pattern, kinda the same design, HUGE aftermarket support, easy/cheap to get, decent sized disc brakes for a little car like the colt. Id just modify the control arms to accept the correct ball joint and like a small aftermarket Moroso spring with an adjuster sleve to dial in the ride height.
This is basicly what Im doing with my little, gasp! again, Courier pickup along with an 8.8/3.73/trac-loc out of an explorer that should take all the power of a turboed 2.0L DOHC neon mill can put out8).....my very budget build built from free/leftover parts....total cost so far $120