.....with Yukon Performance 3.42 gears has been custom-built for the Tempest by Jim Mitschke of JD Race & Restoration in Richfield Ohio (1 330 990 8155) and is now almost ready to ship.
I chose Jim Mitschke (
monzaz on Performance Years) to build this rear end because I thought that his small shop that specializes in Muscle Car differentials would pay more attention to detail and build it like it was his own. I have seen Jim advertising and selling quite a few rear ends on PY over the past few years with many satisfied customers so I figured I would contact him.
I wanted the '71 -'72 Buick 8.5" rear mainly for its strength and for the tapered bearing bolt-in axles, not to mention it's a direct bolt-in on any '64 -'72 GM A-body. I asked Jim to modify the spring perches so I could use the earlier '64 -'66 springs that bolt onto the perch with a clamp plate. A pair of poly bushings will be pressed into the upper control arm mounts on the housing.
Upgrades include a new Eaton 30-spline clutch-type posi (replacing the stock 28-spline unit) that's known for its durability and long-wearing clutch packs. A new set of Moser 30-spline axles were added as well, not only for the added strength but it was the easiest way to get the 5 on 120mm bolt pattern I need to run my BMW-spec aftermarket 18X9" wheels. The axles will come with M12X1.5 studs that are about 1.75" to 2" long to better accomodate the C6 Z06 rotors that are .280" thick at the hub.
These are just a couple of the many pics that Jim sent me during the build, this unit will be shipped out to me next week. Thanks for the great communication, pics and fine customer service Jim!
This rearend is the last big expense on the Tempest build. I'll be able to take the Tempest to the dragstrip once or twice without fear of shelling the diff, and do a little bit of 'spirited' driving when I want to.
I'll still have to spend a couple of grand before it's all done on a new headliner, windshield, radiator hoses, serpentine belt, tranny dipstick tube, wiring, and all of the little things that nickle and dime you to death.
Coming along.
