What size belt do you need to bypass smog pump on 5.0 305 91 Chevrolet caprice?

To bypass the smog pump on a 1991 Chevrolet Caprice with a 5.0L (305) engine, you typically need a belt that is approximately 3/8 inch shorter than the original serpentine belt. A common size for this bypass is around 77 inches, but it's always best to measure the current belt or consult a belt size chart specific to your vehicle to ensure accuracy.