Should I be afraid?? 94-96ish Z28(not LS1)

I think your mid 14's might not be enough to hang w/ LS1's. Although it depends on the driver......how well does his guy drive? I wouldn't be afraid.....it's only a race - you never know what the outcome is gonna be.
Good luck.

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'90 LX 5.0; 12K original miles (no sh*&); 3.55 gears; pulleys;Edelbrock Performer Heads; BBK shorties; MSD 6AL box w/ blaster 2 coil; Motorsport E303 cam; Pro-M 75mm MAF; BBK 70mm TB; Eibach spring kit; Southside welded subs; K&N cone filter charger; Hurst shifter; fiberglass turbo hood; A/C-less; rear seat-less; cat-less; 2 chamber Flos; Corbeau racing seats (fronts);
30# injectors; JMS Chip; 190 lb fp; TFS track heat Intake (12.299 @ 113)