I've decided to get a turbo and any information regarding the differences between a stock 252 and the 261 Thunderbird Turbo Conversion by the Mod Squad would be most welcome. Any differences in useful load?  Performance?  Anticipated maintenance?  Parts availability?  Same turbo or waste-gate?  Ease of operation? Age seems to always be a player...i.e. a modified 231 from the early 1980s versus a 1986-1989 252. Any information from a previous or current owner would be much apprecia