Pistons

Your only option for the 440 piston is the 2266. You could have the crowns machined and valve reliefs cut. That drives up the price, when most likely, you could have some custom slugs made. Of course, you could always try to find some 2388 pistons.
Yea the 2388 piston is not able to be found. I guess I could just do a 406B or a 446RB. It’d be easier. I have factory steel cranks for both.