just wondering what the max out for a MHI 20g is these days with link v3 and all the options we have. Also how am I able to tell what hot turbine wheel I have and compressor wheel I did not buy this new Want to be 100% what I'm working with.

Like most things you if you search for the info on this site you find a lot of good information... However, before they switched to the new site there was a dyno record list which isn't accessible anymore. I believe that the top hp numbers for a 20G was around 450 awhp. This was a td06 housing on E85. The Td06 will generate more top end power but the td05H housing will spool quicker. A good range to shoot for with a 20G is around 350-400 hp... Last year I had my td05H 20g tuned to 363 hp on E85 on a Mustang dyno.
If you want to identify your turbo you should post up some pics and I'm sure the good people on this site will help you out...