How would removing the smog pump on a 1989 Chevy 5.7 liter engine affect efficiency?

Removing the smog pump from a 1989 Chevy 5.7-liter engine may initially seem to improve efficiency by reducing parasitic loads on the engine, potentially enhancing performance. However, the smog pump is designed to inject fresh air into the exhaust system to help reduce emissions and improve combustion efficiency. Without it, the engine might run richer and produce higher emissions, which could negatively affect long-term efficiency and lead to potential legal issues regarding emissions regulations. Overall, while there may be a slight gain in power, the trade-offs in emissions and potential for increased fuel consumption could outweigh those benefits.