In my 09 f350 auto 12 valve that weighs 9000 lbs. it makes boost at 1500 but didn't really lite good till around 2200. No comparison with the stock 351 I replaced it with, it spools almost directly with the pedal.
I bought this already put together, it looks to have a aftermarket compressor housing and exhaust housing so I don't know if the guy I got it from built it or bought it. That being said it's as tight as any new turbo I've had, took it to around 40 lbs. of boost once but mostly just driving breaking in a new rebuilt motor.
I would trade it for a 62-67 he or sell or trade the compressor wheel and housing for a 62 compressor wheel and housing.