As far as your rear axle it could be a Bendix or a timken. On the timken the modle # will be on the top of the axle forward of the pumpkin on a flat spot. That #will give you the gear ratio's. Your truck wasn't made to go more than about 55 mph. The wheels and tires aren't balenced and will vibrate and that truck isn't going to stop very fast even unloaded. If you want more power get a 261 c.i. it will bolt right up to your bell housing and motor mounts. Adds about 10 h.p. in stock form. Add headers, dual carbs and a mild can and you will have all the power the truck needs. Remember, the gearing was very low in those big bolts for a reason, they were made to work, not Cruse the freeway.
I feel the need to mention im working on a far better braking system for the truck as a whole. You are correct they aren't made to go fast but today's roads demand more from our vehicles overdrive and larger tires will work on getting it up to a safer speed on todays highways, balancing beads work wonders on updated rims and tires generally speaking they are so large that they usually don't get balanced at all.
This is the information i was looking for! so its either a bendix or timken any idea what the models were? thanks!
