Hi Bruce, Yes, it is on the Chevelle. The power steering pump on the car is from a truck that used the hydro-boost system. The vacuum booster is already on the car and the Hydro-boooster looks like it would take less space. Been doing a little research and I was hoping to hear from someone that had already tried it and listen to the merit or downside from their experience. Some of the newer units seem pretty small relative to the standard vacuum unit. The braking power should be greater too. Just putting it out there for opinions.