Anybody build a 4.1 with Hypers and cracked a piston? I have 5

[Nasty Wendy]

When I built my 4.1 I used hypers and cracked one before break in was over. I bit the bullet and put in forged slugs. Anybody that is staying budget and needs a hyper or two or whatever, I have 5 that didn't stay in the engine for the entire break in period. I'll let go cheap. $15 each or two for $25 or all five for $35,