Yeah, a 383 piston with a 4.150 stroke crank comes close to working in a 426 block. Just depends on the details and what the engine builder is trying to accomplish.

Semi-custom pistons don't cost that much these days. I think Diamond only charges $15 per piston to change the CH on a standard part number piston. So you just call them up and order a 383 piston and ask them to make the CH a little higher and you end up with exactly what you want. As long as the change can be handled in the shelf stock forging blank the cost is minor.