Sikahema grew up wanting to be a professional boxer fought in a National Golden Gloves Championship that was eventually won by Sugar Ray Leonard.
A little training goes a long way into making up for weight and reach disadvantages.
I am 6'-4" - 240lbs and in decent shape, and I could probably last about 10 seconds to a welterweight pro boxer... 3 seconds would be just to walk out from the corner, 1 second for the fist bump to say hello, 1 second to fall from the punch... make that about 5 seconds I could last 5 seconds..