Body mount bushing size?

[Mikes71bronco]

I ordered a new set of polyurethane body mount bushings from summit. I do not have a body lift and all the old bushings and hardware are original. My question is this. Are the rear 2 bushings behind the back bumper and to the right and left of the gas tank the same size as the rest of the bushings? Or simply , are all the bushings the same size? I would assume they would be but upon starting my project & removing these rear bushings the gap between the top bushing and frame is about a 1" or so. I inspected all the other bushings on the truck and all seem to be similar to the new ones bought. Only dry rotted and old. I wanted to get on here and ask if anyone has replaced these bushings and run in to this. If so did they just get the bolt started and tighten it down to pull the body, bushing and frame together? As always thanks for any of your time and input.

 

[langester]

They should all be the same size.

 

[DirtDonk]

Yes, all eight are 3/4" tall, but I've run into that as well. On a '73 recently.
You may have something tweaked that can be "fixed" by tightening it all down, or you may need spacers.

The key is to watch the door gaps to make sure you're not pulling them out of square.
Luckily it's just the back ones, and you still have the other two between the rear and the door openings.

Probably a lot more to this equation than what I'm saying, and many other vehicles use different heights at different locations on the frame, but that's the basic layout for an EB.
On the '73, we did you some extra body washers, but not that full 1" thickness of them. Just a little more than you would normally see on an EB.
I've heard of up to six washers on a single mount, but I've only personally seen up to four. And these are really pretty thin washers I'm speaking of, so those four probably equaled maybe an eighth of an inch or so.

Good luck.

Paul

 

[Mikes71bronco]

Thanks for the info Paul. It helps a lot.