I don't think I would be afraid of it, but it is hard to tell from the picture. As long as the groove is intact and can support the seal (keep it from blowing out) you should be fine.
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1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers)
1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)
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