Any engineers out there? Need a simple pallet-elevator

Here is the space I'm working with.
The opening is 38" wide at its narrowest but I'd think that should be big enough. Ceiling is 10' high from concrete floor to bottom of beam. Then additional space above. The height from the storage space floor to the actual ceiling beams is 40" at one end of the opening ad 48" at the other.
Here are some pictures:
Garage ceiling 1.png Garage ceiling 2.png Garage ceiling 3.png