Dang what's done to your Zilla that you're only getting 10hrs of piston life? That doesn't sound normal at all.

That's pretty normal for a high horsepower zilla. There have been numerous threads over the years detailing the problem. Jerry has talked about doing custom pistons to fix the problem, but the cost is so high, he probably would never recover the cost of the tooling. So as far as I know it just something you have to put up with if you want to have a 75+ hp zilla