E58 400 plus HP Dart sport build

On the engine front was told they are getting it all cleaned up. He wants to check before I order pistons I'm pissed I should have just ordered them missed all the sales will get shafted on price now. I may just go ahead and pull trigger on my 30 over hell of the block is that bad I may replace see no issue with that compression checks were great and even. Only bad part was lack of oil changes as seen by distributor and Cam when I took a peak inside it.