Mmm.
So a common issue is for the cylinder walls to get scored from the immense carbon build up that bad valve stem seals can cause. It’s actually a common issue as well. They can be checked by running a camera in through the spark plug hole. If the cylinder walls are scored it’s a gamble if reboring and replacing pistons will fix the car. Better to replace the engine. Of course the indys if they’re competent will check this as well.
Here’s Hooveys Run in with bad valve stem seals and the resulting piston wall scoring.
I know it’s not the same engine, but the problems remained. If the cylinder walls are fine . Fix it.