Inliners International Forums General Discussion Engines Best RPM's for crusing @60 - 65 w/ a 235

I would recommend you use low gears in the rear end. If you have a 0.8 OD X a 4.11 rear that = 3.3 total in OD. A 235 will cruise OK on level ground but struggle on hills with a 3.3 ratio.

I had a 261 in a 52 Chevy with a 3.55 rear and Packard OD and it had trouble on hills.

I now have a 40 Chevy with a 302 GMC with a 4.11 and a T5 with a 0.7 OD and it takes hills well, cruises at 65 at 2200 rpm and gets 18 mpg. It could take a higher rear, but not much higher.