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1" block to lift rear leaf spring on '67 Bronco to clear fenders?

MerganserMaster

Jr. Member
Joined
Jun 9, 2023
Messages
115
About a year ago I put 235/75/15 tires on my '67 Bronco (stock with a 170 i6) with uncut rear fenders. Ideally I would like to leave them uncut, while keeping the tires I have on them. However, the middle part of the fender is rubbing against the tires. I see at Tom's Offroad they sell a 1" block kit to "fix saggy leaf springs" (the Part no. is K6848). My question is does anyone have any experience with this kit and if it would solve my issue? Also, as this would be temporary fix (until I can get new shocks, brakes, etc. installed) are there any cheaper options as ideally I could avoid spending $100 on a part that I will eventually have to remove?

https://flic.kr/p/2r35JPz
 

DirtDonk

Contributor
Bronco Guru
Joined
Nov 3, 2003
Messages
51,613
Traditionally at least, blocks were the least expensive method of lifting. Next would be add-a-leaf kits. But if you’re trying to keep it at stock height, you might need to go to a Plan B.
Such as new wheels.

First off, if you can get underneath there with a tape measure, check the distance between the top of the axle tube in the bottom of the frame rail. If it’s less than 6 inches, that difference is how much spring sag you are currently experiencing. If it’s at 6 inches though, then sag is not your issue.
More than likely, the Issue is the offset of the wheels. Perhaps combined with spring sag.

Are you planning different wheels at any time in the future? If so, tuck your 235’s in tighter and you might just get rid of all your troubles.
Wheel width and backspacing/offset are what will get it tucked in tighter.
 
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MerganserMaster

MerganserMaster

Jr. Member
Joined
Jun 9, 2023
Messages
115
This may sound dumb, but how do you "tuck in wheels"? I hope to keep the wheels/tires I have on it for now, if possible.
 

serial car restorer

Yes, I'll restore almost anything...
Joined
Aug 27, 2024
Messages
742
Loc.
Western Oregon
The 1" lift blocks might help some, but possibly won't be enough. The real problem here is your wheels. The tire size is fine. Other new suspension parts (shocks, etc.) is not really going to help unless you lift it 2" or more.

The wheels you have are too wide and too much offset for uncut fenders w/o lift. They look to be 15x8. For an uncut, unlifted rig, I'd recommend 7" wide max. 6" would be even better. Either of those narrower wheels will "tuck" deeper in the fender well.
 
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MerganserMaster

MerganserMaster

Jr. Member
Joined
Jun 9, 2023
Messages
115
Sounds good, I will measure the the axle tube and frame rail to see how much "sag" there is , if its not by much ill look at getting a narrower set of tires put on there. As an alternative plan, is it possible to "roll" fenders with E.B.'s ? I wonder if the lift kit + a little bit of bending might also help the fenders clear the tire.
 

Broncobowsher

Total hack
Joined
Jun 4, 2002
Messages
37,061
Need wheels with less offset to them. Those wheels have a deep dish, lugnuts recessed far from the outside. That makes the track width wider.
Your clearance issue is side to side. Lift blocks change up and down, just get you a little higher. The moment you hit a bump an inch tall you are rubbing again, so not really fixing anything with a block. I can't say a block is worthless for your application, it may help fix a saggy rear spring. But it is not a fix for the wrong wheel that pushes the tire too far out.

As mentioned, the correct fix is a different set of wheels.
 
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MerganserMaster

MerganserMaster

Jr. Member
Joined
Jun 9, 2023
Messages
115
Need wheels with less offset to them. Those wheels have a deep dish, lugnuts recessed far from the outside. That makes the track width wider.
Your clearance issue is side to side. Lift blocks change up and down, just get you a little higher. The moment you hit a bump an inch tall you are rubbing again, so not really fixing anything with a block. I can't say a block is worthless for your application, it may help fix a saggy rear spring. But it is not a fix for the wrong wheel that pushes the tire too far out.

As mentioned, the correct fix is a different set of wheels.
Got it, I still have the set of original wheels (that had the same size tire on them, so I assume they will fit just fine), I will get them cleaned up and swapped (at least just the rear wheels)
 

bmbm

Contributor
Sr. Member
Joined
Jun 16, 2007
Messages
754
About a year ago I put 235/75/15 tires on my '67 Bronco (stock with a 170 i6) with uncut rear fenders. Ideally I would like to leave them uncut, while keeping the tires I have on them. However, the middle part of the fender is rubbing against the tires. I see at Tom's Offroad they sell a 1" block kit to "fix saggy leaf springs" (the Part no. is K6848). My question is does anyone have any experience with this kit and if it would solve my issue? Also, as this would be temporary fix (until I can get new shocks, brakes, etc. installed) are there any cheaper options as ideally I could avoid spending $100 on a part that I will eventually have to remove?

https://flic.kr/p/2r35JPz
New springs is the best solution if you don't mind spending the money now. The Bronco vendors can help with that and the benefit is great. Also your body bushings are probably old and compressed so new bushings and a 1" body lift will give some lift. And as stated the wheel width and associated advice is important. While you are at it a front end bushing kit and new shocks will improve the driving experience.
 
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