Thanks Mike, but the car is not with me by now so I can not tell you how many miles but since I bougth the car a few years ago from a owner number XX I can be sure there are many miles on the engine.
The reason of my post is that the bottom end of the engine sounds better that my knowlege on mechanical matters, I will do the head and replace the gasket for sure, but since I am in a tight budget situation by now and I found two piston sets (first and second oversize) I was wondering if is a good idea just to hone the cylinders and replace the rings or could be a more long term rmedy if I bore the cylinders and replace the pistons (of course if the engine block allow any of this procedures)

Roberto Alvarado