Anyone used the new(ish) Icon #687 or even #690(3.75 stroker) pistons for the 383? I have a couple 383's that could be turned into useful motors with a nice reasonably priced piston, such as the Icon. Looking for opinions, also, measured piston and pin weights, since the claimed weight on the Icon site is clearly wrong(sub-500gm at 1.9xx CH) Thanks. S/F....Ken M