Front tire rolling radius needs to be .78% of rear tire rolling radius or 22.3"
14.9x24 tire rolling radius = 22.5"
Before I buy tires and wheels, I will try to mount some available (to me from my stock) tires and wheels similar to the 14.9x24 on the Dana axle to see if I am in the ball park. I will mark the tires and roll the tractor on pavement. If I am not correct I will be able to extrapolate from that test the correct size.
Remedies would include changing the gear ratio of the Dana (lots of ratios), installing a planetary gear set between the right angle gear box and the Dana, or a different tire size.
I don't think this 4x4 adaptation will work very well unless the rear end is locked. There does not appear to be enough room to do it at the differential. But I don't know alot about tractor lockers. My plans are to install a splined shaft behind the bull gears using the fast hitch holes (tapped all the way through) to support the bearings. One bull pinion gear will be fixed to the shaft and the other will slide in and out of mesh. Shifting will be done with air or a linkage from the unused shifter hole.
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