The firing order for a 5.7L (small block) Chevrolet Corvette engine depends on the specific year of the vehicle. There's no single firing order for all 5.7L Corvettes. The most common firing order for the small-block Chevrolet V8, however, is
1-8-4-3-6-5-7-2.
To be certain, you must consult your owner's manual or a reliable resource that specifies the firing order for the exact year and model of your Corvette.