This is what I was thinking. Ya BB would be nice but i am also doing a complete rebuild among other things so if i could save a few bucks at this time by having my oem turbo housings machined for 500 chra's and have a decent upgrade in power for now for 1200 or so after machine work, as opposed to 2500+ for new turbos.
So are the oem turbos a t22 compressor wheel with a t25 turbine wheel? and is the sport 500 a t25 wheel for both or does the turbine housing need to be machined as well for it to work? thanks