Don't have a 5.7, mine is a 6.1.
Anyway, I can either get new pistons or try to sell crank and rods and get a stroker kit.
Is there any other upgrades you recommend such as oil pump, valve train etc?

70 W100 Power Wagon. 318 4-spd
70 Sport Fury 440 2dr HT
71 Duster 340
71 Charger Super Bee - 383/727
72 Charger "Sabotage" - 440/727 - Street/Strip
78 Warlock in beautiful patina