Looking at the various offerings - you have to be careful on which 440 pistons you want to use. A stock 440 piston is shorter than a stock 400 piston by about .065". That would make the 400 even lower compression than a factory 400 piston would. Using the hyper KB237 - those are much taller, and if you used that with the factory 400 crank and rod it would stick out of the deck over .100". The L2276 TRW will stick up about .025" give or take based on a blueprint deck height. The good news is they're usually taller than blueprint.
So - while it might work I'd suggest you do your homework. It's not like any 440 piston will work well.
