i would like to align the drivers door on my '37 truck. it is about 1/2" low at the back. the passenger door is aligned perfect. i see no way to adjust the hinges to get it aligned. someone told me i need to add, remove shims between the cab and frame to get it the door to move up and down.. is this right? wouldn't this then make the opposite side be off? any help would be appreciated!!! jim