Originally Posted by dareo
I just found the page with specific speeds and horsepower data for a second gen ram diesel truck: http://articles.mopar1973man.com/gen...o-improve-mpgs
It was 27.7 hp at 45 mph, 50 hp at 55 mph, 74.6hp at 65 mph, your truck will vary. but you can see the effects of speed vs hp required.
A V6 truck is more than enough to do the job, and if you can keep throttle inputs moderate, you will get better MPG than a V8.
when i had my 4cyl i could barley even get on the highway with a trailer. think 60 max.