Use a cherry picker / engine hoist / shop hoist, etc. for removing the cab. You will also need a 6' long section of 2x6. Then one guy can put a cab on and off at will. Also works for boxes, engines, etc.
Cab weighs about 250-300.
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me