It is a highway cruiser with a stock Goodwrench engine. Using the calculator above I would be at 1900 rpm at 70 mph. But that is for a .70 OD and the 200-4r is a .67 OD. George, do you remember what size tires you were running? Mine are 225/60R16.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.