That style of Carter pump was installed in my 69 COPO Yenko. By Yenko Chevrolet. Still work to this day. With good delivery. In the 140 MPH range, and at 4 MPG's. That pump has to keep all 4 carbs well fed. Not sure what fuel is going to be valuable this next year. Running 14 to 1 compression ratio. Using 110 octane leaded gas. At $5.25 a gallon. So the gas bill has been in the $1.25 per mile range. And you thought our GMC gas bill was high. Bob Dunahugh Own 4 real COPO Yenkos.