Another vote for hitting that with a hotsie or at the very least, run a garden hose off your hot water heater & use some degreaser you let soak awhile - you have some 20 yrs of accumulated grime, so start fresh to see where you have minor leaks. You may have nothing worth changing parts over, if it's never seen the steam cleaner or degreaser before.
Attaboy keeping with the stock lift parts (heck, bet the OE springs are still worth keeping - I'd pick 'em up to toss on my 40th - so don't toss 'em!
Also, attaboy not going nuts & making a Moab machine out of this - let that happen to the higher miled rigs. If it was mine I'd leave well enough alone too!
Keep that clean, garaged if possible - and I bet you'll sell it someday for a whole lot more than alot of our modded & beaten 80's. Yours is worth keeping nice, and keeping your records - was Dad the original buyer?
You have a honey of an 80, don't let anyone tell you otherwise - that's too nice to convert to a rock runner (blessing and a curse)!