Going to depend on a few factors....axle ratio, transmission, engine cooling etc.
I don't think I have a manual that lists for that year, but I can take a look this weekend.....if you don't get an answer here and I haven't responded by Sat, shoot me a pm as I tend to sidetracked and forget stuff.....
The axel ratio is 4.10; is a 4 speed manual, the radiator is original but I’ll be upgrading it soon to a new better radiator because I’ll be adding AC next year. If you have any more questions just let me know. Thanks!
ive got 4:10's w a 4speed behind a 300 in mine. towed a 7000lb truck on a 3500lb trailer. it handled it just fine, just a lil slow goin up a big hill and if your goin to tow heavey make shure you have trailer brakes workin. the drums on the truck don't like to hold back realy well goin down long steep hills