All,
I'm working toward a mild 120" for my '02 FLHT. Don set my bottom end up, using spare '02 cases that I supplied.
He supplied the #320-0525 S&S 120R style flywheel ass'y [4 & 5/8", short rods for stock length cylinders and 1.050" tall pistons]. He bored the cases for bigger cylinders, skimmed the base gasket surfaces, AND, bored the older cases for '07 up cam bearings. [a big plus imo]
Very fair deal, dollar wise, and all in all, a pleasant experience.
Dave