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The rear ones you are showing are not "bump stops" they are the snubbers for the anti wrap bar. Given the crazy tall blocks you are running I would definetly get new ones to control axle wrap. Ford sells them.
The missing front bump stop will need a drop down bracket to work with your springs.
Do my eyes deceive me, or are those stacked lift blocks? IMO, ditch them and at least get a one piece. Especially, pardon the assumption, with a little one on the way.
I'm not going to give my blessing to stacked blocks but if you check your ubolts torque on a regular basis I doubt you will have any issue. Stacked or single, a block that tall has much more leverage then the stock ubolts were designed for with the factory block. I have always switched to larger ubolts when going with any block, id strongly suggest it with the height of yours.
The problem with aftermarket snubbers on the anti wrap bar is finding them the same height. If they are shorter they will allow the axle to wrap until the rubber makes contact.
Thanks for the replies. I bought the truck a couple of months ago with an 8" skyjacker lift already installed. It goes without saying that I should have addressed this sooner. The PMF blocks and 3/4" u-bolts look much safer and more secure than my current setup. Planning on giving them a call Tuesday.
In the meantime, is anyone currently running them and if so, what are your thoughts? Any suggestions on alternatives? FYI - I tow very infrequently and when I do it is typically of very little weight.
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