Starting to get all my parts together to build a 1604 Gordini engine, with my new 78mm 10.5 to 1 Wiesco pistons, the new wrist pin is 21mm, need to bore the rods out to 23mm then insert a new bushing to fit, had to make a fixture to hold the rod in place to machine the pin end out to 23mm, the rods will then be pin honed to suit the new Aluminum Bronze bushings that I made , the press fit will be .001 interference fit, once installed they will be honed again to fit the 21mm free floating pin to .0003 clearance, one of the pictures shows an older Gordini rod with the bushing installed, will keep you posted on the build
