The biggest hurdle you would have to over come is the track width of the front axle. You would either have to narrow the axle of the 2001 or widen the fenders of the 41. If you feel like this is do able, then you may also have to stretch the length of the 41's hood or add a dog house to the inside of the cab to cover engine. The width of the radiator is something else that I am sure would have to be addressed.
This is such a cool idea that I hate to discourage it. The only way to know for sure is a tape measure and a lot of planning.
Anything is possible. Maybe it would be easier to put the 2001's power train into the 41's frame swap out the rear axles and adapt the 2001 spindles and brakes to the 41's front axle beam.
