They are still the originals, guess they weren't up to a days caning on the strip . If I replace them with standard ones, will it be ok, or should I go for nylon replacements? Thanks

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'86 Iroc ZZ4
Best Run 13.8 @ 100mph
I told you to blow the bloody doors off!
The British Firebird/Camaro Site

 

i have no idea what you have avaiable to you there, but i'd replace it with a ES poly mount, you won't break another one and the price is about the same.

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

 

Those are famous for being weak in these cars. Like ede said, the one to get is the Energy Suspension one, you can order it from Jeg's or Summit, and not have to worry about it for a long time.

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"So many Mustangs, so little time..."
ICON Motorsports

 

The surest way to fix it is with a Spohn torque arm kit, which mounts the arm to the crossmember instead of loading the tranny mount.

But, the poly mount is a big improvement over the stock rubber.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet (Holley 3310 on the way), GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).