IIRC, the stock rear sprocket is 38T, so even the 60T should make quite a difference. I assume (never wise) that the torque converter sprocket is 10T. Also assuming that the torque converter is basically the same as other Chinese series 30 type knockoffs, it should have a theoretical ratio range of 2.7:1 to 0.9:1. You can calculate overall ratio by multiplying the primary drive ratio (torque converter) by the final drive ratio (sprockets).
38/10=3.8 (3.8::1 ratio) 2.7x3.8=10.26 (10.26:1 overall ratio) 0.9x3.8=3.42 (3.42:1 overall ratio, the torque converter would never reach the 0.9:1 overdrive though, which is why I used the word "theoretical" previously)
60/10=6 (6:1) 2.7x6=16.2 (16.2:1) 0.9x6=5.4 (5.4:1)
72/10=7.2 (7.2:1) 2.7x7.2=19.44 (19.44:1) 0.9x7.2=6.48 (6.48:1)
Because the MB200-2 has 19" OD tires (tire OD makes a difference, search "effective gear ratio" if not familiar with it), I don't think the 72T would be too large, ratio-wise, especially if you intend to ride rough terrain, steep hills; your chain/sprocket should be around 3.5" off the ground.
@Rapidrob rides a torque converter equipped Hawg Ty on mountain trails, he could better advise you on this.
@noseoil is another member who could advise you on torque converter equipped big tire bike gearing. The 60T might be a better choice for most riding conditions and should provide close to an inch of additional ground clearance compared to the 72T. Link to sprocket size chart below.
Yes, you will die, that is certain.
https://www.rollerchain4less.com/sprocket-diameters