The subject says it all. I need a pair of backing plates for my 9 bolt as soon as possible. If anyone knows where I can get a pair please let me know. Thanks Matt

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1988 IROC-Z T-Top "MATTSTOY"
350 Crate engine
370ft. lb Torque out of the box
5speed, Centerforce clutch, Spohn Sub-frames & adjustable pan hard rod, Jamex 1.5' Lowering springs, 2 1/2' Exhaust,ram air setup, ported and polished plenum, soon 3.45 9 bolt rear end with discs!

 

Is this for the 9 or 10 bolt rear? You can't get the 9 bolt plates new from the dealer anymore, but you can get the 10 bolt plates. If you need the part numbers they are in the tech article section.. here they are

#10136853-LH mounting plate(1)(10 bolt)

#10136854-RH mounting plate(1)(10 bolt)

#10080875-LH mounting plate(1)(9 bolt)

#10080876-RH mounting plate(1)(9 bolt)

 

The 10 bolt pates are about $13 each from the dealer by the way.

 

Its 9 bolt and yeah thats why I can't find them!

 

Good luck, I found my though a add in hemmings motor news. I paid 50 bucks for both, and they are the new design. The first design was really big.

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Taylor Spiro-pro wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

 

Can ten bolt backing plates be modified to fit a nine bolt?
Thanks

 

I would think a machine shop could do some work to a 10-bolt bracket to fit it on the 9-bolt. I bet it would cost you more than 3 or 4 sets of used 9-bolt brackets however. The big issue is the axle retention .