Electric pumps are also better to fight vapor lock in hot area's. My buddies 68 Cuda 383 used to vapor lock on very hot days but never a problem when we installed an electric pump. The fuel is under pressure with the electric pump vs fuel under vacum being pulled up to the mech pump. I will take an electric pump any day over the mech pump. My sons holley red pump is 12 years old and still going strong and mine is 3 years old. Ron