[goodyear1984]

well the oil pressure loss is the most likely bearings,well they do run forever.it all depends on what u wanna do.u can do it ten ways.i know how to do this work so i might do it differently the some people.heres 2 ways u can do it because it sounds like you dont beat on it.
if you have the money and ur just looking for close to stock,i would rebuild,pistons kb $450,rods scat i beam only like $220,crank grind,timing chain,oilpump
or you could just do rings and bearings if you dont have the money,but who knows how long that would last.
or you can buy a used motor