Really good question! I've wondered that myself so I looked in my 1965 Chevrolet Truck Shop Manual Supplement and on page 1-2 they show the driver's side at 3 O'clock and on page 1-3 they show the driver's side at 6 O'clock and on page 1-4 the passenger side is shown at 9 O'clock, so I say whatever you like.

I think driver's at 3 and passenger's at 9 looks best to me.

That's my two cents.


Tom
1965 Chevy C10, 230 straight six, 2WD, 4-speed manual