I drove to Carlisle in 2017. Filled up right before I got on the Ohio Turnpike and refilled when I got off the PA pike exit in Carlisle. I think it was 320 miles and the last 3 hrs was through a driving rainstorm up and down the PA hills.
1964 Val convertible, top up, 3.23, 7-1/4, 3 speed manual, 195/70 X 14 Kumho radials, fresh and completely rebuilt 225, rebuilt head with pocket porting/gasket match by me, mild Oregon regrind, stock rebuilt BBS, breaker point ignition, about 8* initial timing, 2" single pipe.
I tried to keep it steady at 65 even through the deluge and passed everybody in the rain when the lesser vehicles slowed down.
23.8 MPG on one tank.
I was disappointed when I drove the 6 hrs to Clay City, KY this September but was in a hurry and only got 22 going down. Didn't check going home but it was driving through the remains of a hurricane.
