Take an hx40 center section, compressor wheel, and compressor housing, put an hx35 exhaust wheel/shaft in the center section and the hx35 exhaust housing. and of course i would be giving you cash to boot... let me know what u think..

 

if you do a 62 it will be an awesome tow rig I ran a 62 over a 475 it also depends on the exhaust housing size of your 475. I would get a 62/71/12 for quick spool up