2 of my pistons have holes drilled in them where the oil ring goes on but the other 2 dont will it be fine to run them like this. Its been like this for the 50 years my grandpa had the car and it ran decent before I took it apart
as long as its apart, it would be nice to balance them. its easier on the poor old crankshaft
The pistons with oil rings would be replacements at some time, originals just ran 3 cast iron compression rings, the oil ring pistons could even be much lighter than the other 2 as well, see how it all measures up, but I'm sure it would be due for a rebore.
frank is right, nothing like a fresh healthy motor
IMHO it would be crazy to consider putting iron pistons back in (I'm assuming that's what you've got).
A new set of aluminum pistons and rings is relatively cheap and your crank shaft will love you for it. ;o)