The stock 8.2 rear end is notoriously weak once the power goes above stock or even when driven spiritedly. Here are a couple links to some reputable rear end guys. Many of the PY forum guys prefer the 9" Ford rear because of it's simplicity if gear changes and reputation for being tough. Many prefer the GM 12 bolt for it's strength. Talk with the rear end guys to learn what you really need. Most of the following include the axle brackets pre-welded to the housing using a jig.
https://www.quickperformance.com/?g...gIgtngqvYy_bUliCBlFRv4mA9M3ifbLcaAsJiEALw_wcB
12 BOLT MUSCLE PAK - Moser Engineering
Here's a link to a discussion of 9" vs 12 bolt:
9" vs 12 bolt - PY Online Forums
Luck!
Just to add, I selected the 9" rear housing & axles from Quick Performance for a number of reasons. The Ford 9" has been around since I believe 1957 and has been used by hot rodders and drag racers ever since. Aftermarket parts are all over the place, from individual parts to complete assemblies. Gearing is the greatest advantage in my book. You can pull the gear assembly out from the front and if you build another gear assembly, you can swap them out in a couple hours - like keeping a set of 4.11's for local blasts and driving versus slipping in a set of 3.23's because you are going 5 hours away to a car show. It is stronger than a 12-bolt in my opinion.
12-bolt's, if factory, are difficult to find any more and expensive if you do. Posi units have clutches and they wear out. Gear changes require rear end disassembly and has to be set-up each time if you swap out gears. You can't bring the "meatball" to a shop like a Ford 9" and have them do the work and you install it. If you cannot do it yourself, you have to bring the car to a shop or the entire rear end to have it set up.
The other option as discussed many times here is the later 971-72 8.5" 10-bolt, but you get back into trying to locate one and then the cost, and then the rebuild.
So I feel that for a bigger HP/TQ engine, the factory 10-bolt is the weakest link and if you enjoy "using" your car which should be the reason you built the engine up in the first place, it is not a matter of IF it will grenade, but a matter of WHEN - which is always at the worst time when it happens.
Here is my build list and prices to rebuild the 9" I am using in my build. You can probably get a complete rear end cheaper, but I wanted to assemble the rear end the way I wanted it done - do it once & do it right.
9" FORD Rear Axle Assembly - 1968 LeMans
Quick Performance GM A-body 9" housing w/31 spline axles - $745.00
Upgrade to 1/4" heavy walled axle tube rated for 600HP+ - $ 30.00
Upgrade to new housing center piece & big billet bearing ends - $100.00
11" drum brake kit - fully assembled - $300.00
Shipping - $130.00
Yukon Nodular big-bearing differential case - $354.03
Currie 9-Plus Big bearing pinion support - $114.95
Currie Open carrier case - $105.95
Bolts - Grade 8 for pinion support - $ 7.45
Complete Timken bearing/seal/installation kit - $136.95
Pinion bearing solid spacer kit - $ 16.95
9-Plus big bearing forged driveshaft pinion yoke - $130.55
Power-Trax No-slip locker -$430.00
Shipping -$ 15.65
Motive Gear 3.89 ratio ring & pinion gear set - $189.97
Shop assembly of third member/set-up gears - $128.98
Parts Total -$2,661.80
Shipping Total -$ 145.65
Labor Total -$ 128.98
TOTAL $2,936.43