My 1st concern would be with the tranny life......how are they achieving this? While through programming, line pressures can be (safely) increased there are limitations for the design.......IMHO...if the program ups the internal PSI to the point that the tires are chirping (or almost chirping) with every shift...tranny failure is soon to happen.....
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Flatheads ain't so bad!
Certified backyard mechanic I & II