Likely 383 swap-parts advice requested

Not a doubt in my mind-but if they're not off the shelf slugs, price goes up. Not saying I wouldn't like to have a set of Ross slugs...just not so sure if I need to pay that much for pistons. I'll figure it out when I dig into the engine and decide which direction I wanna go with it.

Sorry if I'm coming off wrong, just still sizing up what all I need.