Piston to cylinder clearance?

The pistions are used, Im not sure who makes em.
I looked on summit to see if i could find them with no luck.

All i can say for sure is they are not forged.

my motor building buddy is good, verry good. The motors out of his shop sell in the five figuer price range. (Ive seen him anwser his cell phone and say "Hay Don" like its no thing. Thats big daddy Garlits to the rest of us meer mortals..)

I cannot afford to pay him what hes worth, He will come by our shop sometimes and look at our cars, hang out and offer his advice.

He wants to see eight thousands clearance.

I will take some.carefull picks nextime im at the shop. May hap after work tomarrow if im not to tired.

Thanks again for all your time and advice.