I purchased new shackles for the rear cab mounting. The shackles came and the were not right and left so I had to redrill holes for one side to make it fit to the frame. I am now trying to mount the cab to the frame. The shackles are too wide to fit up in the rear frame mount. Do I have to take the shackles apart and grind off the sleeve to make the shackles narrower to fit up in to the rear frame mount. It appears I do. The only other thng would be to put spacers between the floor and the top of the shackles. I do not have the old shackles to compare the width

Thanks

Bennie