Atsii,

I own a 66 337A, and my POH also says that the max gear extend speed is 140 mph. On a couple of occasions, I was unable to retract the gear, and had to make some short trips with it down and doors closed. Frankly, I could never get much over 140 mph with gear down.

Now . . . I don't have a powerful and fancy T model like yours , but I never had to worry about pushing the yellow with extended gear.

Are you asking because you want / need to do it, or just pure curiosity? If you have done it, could you get much more speed above 140?

Keven
________
WENDIE 99