x2 on Wayoflife's statement above. You are basically going to need to upgrade the systems on the old vehicle to mimic what makes a new vehicle so much more friendly, which generally means ride comfort and safety. I keep contemplating doing this with a full size jeep (FSJ) from the late 60's, to as new as the late 70's, like a Cherokee, Gladiator (J2000-4000) or J20 for my tow rig. I would start by upgrading at a minimum; suspension and brakes(probably newer axles too) to a 21st century set-up (this is the ride comfort and safety part), then eventually a motor and transmission upgrade to a more efficient powerplant combo. Then lastly would be the interior comfort, aftermarket a.c./heat that works, seats, etc.
For me this is all for nostalgia reasons, I like the old iron and it would be nice to let others see what used to be common place. But truthfully, new jeeps are way more capable than any of the old CJ's I have owned. I am by no means trying to talk you out of doing a "restoration", because everybody gets the itch at some point. But again, the suspension and brakes are where most resto-mods begin. Good luck brother
