We pulled a neighbor's B model engine apart today for a head gasket issue, anyway got it apart and found it had aftermarket IPD cylinder kits in it. Was surprised that you could still see some cross hatch in the liners. Asked the owner how long ago it was inframed and he pulled spiral note book out of the jockey box with all the maintance records for the truck since it was new. Said it had been 516k since the inframe. Also had found a aftermarket headgasket that we believe to be the culprit. Anyway checked the liner protrusion and all is good so we got a steel spacer plate ordered and a OEM head kit to put it all back together with. Well just wanting to hear if anybody's had any other experience with IPD good or bad.