Turbo selection

I came accross this little sizing, A/R selection explanation:
http://www.moddedmustangs.com/forums/power-adders/628-turbo-size-r-trim.html

I have read some positive reports about this turbo.
http://cgi.ebay.com/ebaymotors/GT45...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I am thinking about using one on a 318.