It will come back to you by and by . I learned all about engine rpm shifting when I was in the army and bought a '52 ferd 1/2 ton with a monster mercury flathead v8 mated to a '37 non-syncro transmission in it ( hay it was cheap and I needed wheels ) . Other odditys it had 2 12v. batteries and a switch that let the horn be the stock one or a AUGAAH horn and a plywood bed with flat sheetmetal wheelwells/fenders nailed to 2x4s to hold them on - talk about a "Fun" and Ugly truck to drive .
