Re: 84cj w/ 350! its damn slow, what gears to use??
If its got stock gears, they are problably 2.73's. 3.54 or 3.73 would be a much better gear for those tires. I ran 3.73 with 33s and they were a good compromise between street and trail, of course that was with a straight 6... not a 350.
My 2 cents, anyway.