It was OK with the stock converter, but likes a little more stall. Also ran it with a 2800 stall and that was about perfect. Very fast spooling turbo. Also, wastegate hole has been ported for Terry Houston style downpipe which really controls boost creep.
I'll ship to Canada. My 6157 is basically the same turbo as a 6131, but has some newer technology and ball bearings. Spoolup would be significantly faster on the 6157 ball bearing version.