Originally Posted by RazorsEDGE
Changing the bearings has me worried though. I have very little knowledge when it comes to engine work. I really don't know how to change the bearings and I was also told that just throwing in new bearings without machine work can cause catastrophic failure. I don't really know though, like I said, I just have no clue when it comes to engine internals.
If you are having oil pressure issues it would first be good to find out why. Either the oil pump is getting old and isn't able to push as much oil as it used to, or (more likely) your bearing clearance have opened up from all of the miles and unable to build as much pressure.
If you are willing to put in all new bearings you might as well do a mild overhaul. I would not suggest putting new bearings on the engine with it installed. Pull the motor, remove the crank and rotating. Check all of the crank journals for any scoring or nicking. If you can catch your finger nail on any of the marks on the journals it needs to be machined down. Have the crank ground down 10 thousandths of an inch and buy undersize bearing so that all of your clearances are within spec and tight (rod and main).
If you are that far in you might want to consider new rings, just depends how far into the engine you are willing to go. Just remember that a high volume oil pump is only a band aid if the bearing clearances have opened up.