The only AT-6 in that engine range that I can think of is the Midwest. Powered with a Moki 1.35 and its fast! Debbie Redmond world class flyer at the Sepulveda Basin, CA. I believe Ed Redmond can give more details, he's built two in the past few years... where are you Ed Red!
Here is their website
http://redmond.rcplanet.com
fw190