Changing Connecting Rod Bolts.

As Rusty has already expressed, it's cost effective to just replace the rods, and upgrade the pistons to say a KB107. Either run what you have, or upgrade everything.

It's black and white like that.

I stayed with the old; quick re-hone, new rings, new bearings, old rod bolts +1. Hell I've got a bastard piston in there, runs and revs clean and fast. I tried to find a reason to worry, but once it starts and runs, all that melts away by the way it sounds when it runs at 3500+ rpm. These bottom ends are tougher than they are given credit for. Check out JoeDust451 and LXguy, both great examples of clean it up and beat on it.

Now if you want to spend money on it, then go right ahead and get new rods and pistons, the deck cleaned up with new bushings; and all that other crap that adds up to about $5-700 worth of machine work. My opinion, both will be 'durable'. You can just squeeze a little more power and piece of mind out of the latter, good ruck!