I just put a freshly rebuilt 140 in my 62, I have a 65 tranny and 3:55's. .30 over with a Racer Brown cam with lift of .425. The Primaries are Grants and I rebuilt the secondaries myself. The first trip I made was at about 70-75 MPH I checked my miledge and I got 22.6 for the whole trip. I used actual miledge not my speedo, I know thats not correct. Ron