Using the OP's stated 90.25" tire circumference (28.74" diameter) I calculate 2737 RPM at 60 MPH, just like MikeB..
Last edited by Bill Hanlon; 09/10/2023 4:08 AM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| 
