Interesting - thanks for the insight on the squirters. I was not aware they were anything other than a tube and orifice but that makes sense if they have a moving part that can cause issues.
Just dropped off a bunch of parts at the machine shop. He asked if I wanted to balance the crank / rods / pistons for an extra $300, but said it usually wasn't necessary with these engines. Anyone here have an opinion on balancing during a rebuild?
If you plan to turn higher RPM, you may want them to match the balance factor to the goal rpm range.
The higher the rpm, the greater percentage.
This means either more weight on the counterweights, or less weight on the piston/rod/pin side.
The more modern crank balancers will actually display this info on the control screen.
The balance factor is determined by the weight of the lower half of the rod, and rod bearing added to a percentage of the upper rod, pin, piston, and rings.
Shops that do a lot of race engines will know the percentage numbers for different rpm ranges.