Would it be best\eaiser to buy a hole new rear(install myslef), or should I just redo(pay someone) my current one?(3.73 gears and posi) thanks!

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92 Firebird
305TBI, Edl.Tbi Perf.Manifold, Full exhaust, Mac muffler, air intake, 16" wheels.

 

Sometimes you can get lucky enough to find a 3.73 posi in the junkyard (the older T-5 Fbodies had them).

Or you can build it up yourself. Check this out: Rear build-up

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If you live in Southeastern US, check us out!
South East Thirdgen

GM Master Tech
ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Whatever chip I feel like burning,
JET AFPR, Ported Plenum,
TB Coolant Bypass, Custom Cold Air,
SSM SFC, KYB Shocks, Boxed LCAs, Wonder Bar,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
3.73 Posi
4wheel Disc Brakes
Summit 1-5/8" headers, 2.5" Dynomax catback.

Best 1/8: 9.519@72.74

'97 Bonneville SSE