is there going to be any problem running 24lb injectors on a stock 5.7?
its a 91 z28 with just exhaust

 

Yes. The computer PROM is setup for 22lbs injectors and to run rich at wide open throttle, so the engine will run even richer with the 24lbs. Its better to get a custom chip programmed for the 24lbs injectors before you use them.