Is your YJ just a toy or a family vehicle because older broncos are generally not reliable sources of transportation. A 81 Bronco with 6 inches of lift and 35s is definitely a toy and not something I would trust as a reliable daily driver.
It doesn't matter if its in great shape or not, the last bronco rolled off the assembly line in 1996, so age has taken it's toll on all of them. I've dealt with friend's broncos including a similaly modded 83 and three pristine stock ones (91, 94, and 95). Constant fuel/ignition problems, electrical problems (window motorrs, especially the rear tailgate one fails often), RUST, brakes, ball joints, broken axles, transmission issues, broken shock mounts, etc. If it wasn't the maintenance, the gas mileage sucked (8-10mpg city stock) and the handling is poor compared to a Jeep.
Don't get me wrong though, I owned a 90s F150 that I loved and love the Eddie Bauer edition broncos, but wouldn't drive one daily.
If your looking for something that's good on and off-road but can still haul the family around, why not a cherokee? Either a grand cherokee or a regular old XJ would be something that is far more reliable, safe, easy to maintain and cheap to own compared to a bronco. You could probably sell your YJ outright and buy at least a decent XJ or maybe even find an XJ owner willing to trade for your YJ.