Mark,
My CFI can give you 337 instruction. The nearest examiner we could locate is near Baton Rouge. One of the difficulties with a 337 is finding a CFI and an examiner for the ME CLT.
I would be glad to take you up in my 1965 337. Have had it for a few months and am very happy with it. Based at CXO. You can email me at
brian@nmrpetrophysics.com
Brian