Alright, I'm trying to gather a lil info. How much displacement can be had from a Blasty engine? I've seen bbk up to 265 & I've seen +4 stroker kits but I've never seen a bb stroker. I'm sure a custom piston could be built but I'd like to know what's off the shelf? Also, if it is possible, is it necessary to use a shim between the base & jug? In most applications the wrist pin is just moved in the piston but it seems to me that a shim could be used to keep port timing correct & still use a typical bb piston with the stroker. Hope I communicated this well enough, Lol!!!