I don't cut them in half. I drill a 3/8 hole in the 2x2 and put a 3 3/4" 3/8" bolt in it. On the driver's side the bolt head in in the drop part of the floor. You need to use a lock nut also.
I first tried the cut-in-half method. The result was the rubber hangers really stretched a lot and were not strong enough and both cracked. I then used the full size rubber, used a longer bolt and tapped the hole into the 2 x 2 frame. Seems to work.
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