Polishammer....OK so the engines fit other applications...so I would guess they are made & stock piled and pulled when the assembly need arises? - Still does not accurately validate the build date....I guess the Messick youtube along with the comment from the other blogger is the answer for the year of the tractor...The sale date....Regarding the hood.....It was never opened when the tractor was delivered..The driver unloaded it went over a few things briefly and off he went...Shortly after my welcoming party left I tried to open it and the lever will not budge...using hand strength...I'm not going to strike it with a rubber mallet, I'll let the dealer take care of that this way if they damage the latch or the hood its on them....My friend has a BX22 and it has a pull knob on the dash and works like a charm...However corporate always feels the need to reinvent the wheel, just can't leave well enough alone.....