Why not a 413 ?

dukeboy_318 said
meh. that is not exactly true. 413 pistons are about 10 bucks more a piece off the shelf than 440 pistons. and 60 on a set of 8 with similar piston specs as the 440s, just with a different bore size. This thru summit. The big factor is selection is limited.

413: View attachment 1715464992

440:View attachment 1715464995

They are pricey for a cast replacement re-builder piston. Set of 8, 440 cast piston, $250. Set of Cast 413, $450. You can get Forged 440 pistons for under $400. Rings cost more too. It just cost more to rebuild the more obscure engines.