Thank You oldsinner,
Yes I know what turbobandit does with those engine though I think his numbers are a little exaggerated..
If my engine wear is out of tolerance I need to buy 6 new pistons 1 size bigger, 89mm in my case.
With a little more I could buy custom pistons with the possibility to reduce compression ratio.
I'm emailing with some Carrillo distributers in California.
If someone here has done the same job is possible that they have in the database all the dimension they need to build a set of pistons for the m104980.