Have found some 426 wedge pistons old school mickey pistons ones brand new but they take a .984 wirst pin, which is the small block wirst pin size, what kind of pin or bushing to make them work with a big block stock rods?
Try calling both Jahns, if they are still in business and or Ross pistons and see if they will remachine the wrist pin hole in those old M/T pistons for you.
Mickey Thompson always had vendors make his parts, he didn't own the company that made them for him,
Maybe even try Crower on fixing them for you
