Sonic checking my 71 360 block

Yes I should of checked it before I started but I didn't. My mistake was thinking it was a standard bore block. Friend gave it to me out of a 74 Dodge Motorhome that he had forever.

I can get 4.040 pistons. Having a set made at wiesco as I will call and just have them made .010 bigger.

I was doing the sonic checking as my machine guy let me barrow the sonic checker.