7mm + bore.
There is a point at which the problems will start and the price would go up drastikcally.to have custom parts made.
92mm is it in my opinion, just so happens the Mazworx gasket also will seal a 92mm piston. Mazworx would not go past 92mm and it was hard just convincing him to go up to 92mm bore. Was about the same time I measure the gasket and posted up that it would seal a 92mm piston.
I am sure Mark will chime in sometime about the problem of going bigger. One of them has to do with the stabalization of the block as you are starting to get into the webbing of the block if I remember correctly.