If you're going with a converter for that combo, I just listed a brand new in the box 9X11 and superpump built by Bruce. I changed the direction of my combo so I won't need it.
Check the parts for sale section. THe converter spools at 2800-3000.
Rich
P.S. I hope you don't need any stall with that turbo, as I'm stepping down from my 51 to the 49.