If I could put in my two cents worth on the rear ratio or the experience I have with a 235 w/over drive. I have a '55 chevy p/u with a three speed o/d trans. and a 338 ring & pinion. It cruises good,however,, when I try to pass an 18 wheeler and hit his head wind I run out of eng. ( thats in o/d) now a tail wind is a different story, don't know just how fast it will run, came out of Okla.City one day with a tail wind, I was going 85 mph @ half throttle....something to think about.......
