Millardair in Toronto had a fleet of DC-3's equipped with the MLG doors and cowling modifications, they called it a speed kit. As far as I know that mod was done by a company in St. Louis MO called Remmert-Werner. I believe the mod also incorporated Pratt R1830-94 engines, giving 1350 instead of 1200 HP.
Hollinger Ungava did indeed have the crosswind gear on their DC-3's, but no Pratt R2000's, just the garden variety R1830's. I know that for a fact since I worked for 30 years at the company that succeeded HUT. There was one R2000 DC-3 in the next hangar over from ours, operated by the Canadian mining arm of the United States Steel Corp. In addition to the R2000's it had a rudder spring tab to help with rudder forces in an engine out situation, and the increased gross weight from 26,200 lbs to 26,900 lbs, an APU, weather radar and a one-piece heated windshield. I flew it a couple of times, it handled nicely and was about 20 kt faster than the vanilla version - 165 vs 145 kt TAS.
Edited to add pic of CF-QCM.