Ithink a spun bearing can be coursed by more the then just oil issues,bigRPM, poor maintains. Think and also help with a spun bearing.
I saw a Tomei RB28 Kit for $6500 if i was rebuilding again thats something i be looking into Because my current engine cost me 1k new crank,1800 billet rods and 1400 pistons so that 4.2k may as well of brought the tomei or HKS step 1 kit for that.