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Discussion Starter #1
I figure that someone will have already tried this somewhere, but i can't find anything on the net about it...

My 68 is tubbed and can fit up to a 20" wide rim. Problem is that anything over a 10" wide rim is a problem with the local laws I have to deal with. The rear end is beautifully built, and it seems a waste of space and money to have a complete housing/axle assembly sitting around for when I want to swap between the big wheels and a set of 18x10 street wheels.

My question - has anyone seen a rear end housing extension before? I was thinking that you could buy two housing ends and weld them together with 3" tube joining them (to the overall 5" length that I need). This could then bolt up directly to the existing housing end so that the only changes I'd need to make from "pro-street" to "legal-street" is to remove the axles and brakes, bolt up the 5" extension housing, install longer axles and refit the brakes with longer flex lines.

I can't imagine that there'd be any deflection in the axle housing, but I wonder if anyone has done any torsional testing? Seems like a good way to keep the complete 3rd member, housing, hard brake lines, tailshaft, 4 link bars and coil-overs all in place without having to touch them...

Am I insane, or is this a feasible option?
 

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If it's a 9" type housing, I don't think it would be too bad to add the extensions and then put a new back brace on the housing and tie it all together. For a 12 bolt type housing, I think you could have the tubes removed and longer tubes installed.
 

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/// .... Geez I feel bad for ya. You have put all this time, energy and $ to get that car over there.. and the local police cant see clear to let you enjoy it. It is truly a 'one off' for your area.. and I am sure it does grab a lot of attention .. but come on!!! Let the man enjoy his car!!!
 

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Discussion Starter #5
Ray and Steve - I was thinking more of a bolt-on option so that I could quickly change from one housing/tire width to another width without having to change out everything. I hate the idea of buying another COMPLETE rear end assembly, but I also hate the idea of having to remove a complete assembly only to strip everything off it to reassemble onto the other housing.

b-man I completely agree! Then again, I new the rules long before I bought the car, so I can't really complain...

I'm going to ship a cowl hood and some other bits over shortly, so I might have to bite the bullet and just order a wider housing/axle package
 

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Discussion Starter #7
Hi Mike. That's my reluctant decision. At least Strange have some killer pricing on their 35 spline S/T Series axles over here at the moment. I have a new set of wheels on the way - 20x10" on the back and I'm going to run a 305/50/20 tire so that it retains a pro street style with a big sidewall, but hopefully will attract a little less of the wrong type of attention...
 

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I have been thinking of putting a original set of SS wheels on my car. I have the 9" as well. How much money would it cost to do this? I really hate the pro street look, but I bought the car already set up this way :(
 

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Discussion Starter #9
Trey - I'm intrigued why you'd buy a car that had been "cut up" if you don't even like the style?!? You are a curious dude! :)
I'd guess a wider 9" housing would cost you $500. That should cover the purchase of an old Ford housing, new housing ends, new suspension mounts, etc. After that it's just a matter of ordering the right length axle kit, bend up a new brake line and you're done.
A complete housing with axles from a shop would probably be $1200 at a guess...
 

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Discussion Starter #10
To kill this thread off - a final note to say that I went ahead and had a housing built to suit the 20x10 rear rims that I bought. I like the way the 32" tires look on the car, and the tire shouldn't pose any problem for street use over here. Good result!
 

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Discussion Starter #12
Hi Mike,
What's that saying... The only thing that remains constant is change???

I have yet again changed my mind. This time it's the tire size. The 32" tall tires were a bit too high for me to get the rear to sit low enough for my liking. It was really tight in the dog-leg area (is that what you guys call it - where the sill end and the rear wheel arch begins?), but it would have been achievable. The main problem was the top of the tire being only a couple of inches from the wheel tub at ride height.

I've attached some TERRIBLY POOR QUALITY photos taken from a 4 year old Nokia!!!

Here's the 20x10 rim with the 32" tire. It's a Sumitomo 305/50/20. This photo could easily look like a 17" or 18" rim, as the sidewall matches the rim size pretty well.



From another angle it shows that the tire doesn't really look very wide, even at 305 width. It sits reasonable well on the rim, but you could definitely go wider...



About an inch above ride height (just sitting in the wheel arch, not attached to the rear end)



Worst photo I've ever taken...!



Actually, no I think this one is. It's just to give an idea of what a skinnier / tall tire looks like in there...



I've since fitted 315/35/20 tires, which are a touch under 29" tall. At 35 profile, they're more "Pro Touring" than "Pro Street", but a 4.5" sidewall is still a fair bit larger than the front tires, so it all still looks in proportion.

The tire fitter scratched one of the rims fitting the new tire (yep - just what I wanted!!!), so I'll post up some clearer outdoors pics with everything bolted up when the wheel gets back.
 

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Discussion Starter #13
To compare, this is what it looks like with Chrome 20x14 Coys. I like the idea of having the big/wide/shiny option if I'm in the mood for showing off, but the understated painted Boss wheels for keeping it low key.
I have a set of Weld Magnum Drag 2.0 15x15 for when I want to run a decent number at the track.

 

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I have always wondered if it was possible to backhalf a car for really wide tires, but not narrow the rearend so much and use wheels with excessive backspacing.
 

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I have always wondered if it was possible to backhalf a car for really wide tires, but not narrow the rearend so much and use wheels with excessive backspacing.
It could be done but dont know what stress it would put on the bearings.

I've seen T-Buckets with excessing backspacing before but they aren't as heavy as a chevelle.
 

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I don't think it would increase the stress at the bearing the way it does when wide front wheel with large negative offsets.

It seems like most of the 15" wide wheels for drag cars have very large negative offsets. It seems that would be more stressfull than a similar positive offset.
 

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It could be done but dont know what stress it would put on the bearings.

I've seen T-Buckets with excessing backspacing before but they aren't as heavy as a chevelle.
I'm actually in the final design process to make a limited run of fabricated 9" rear housings.
The housing ends will be floaters. Removes the stress significantly.
I cant justify spending all the money on a housing, center section, gears, axles etc.. Later decide to make a change and start all over.
The design I'm doing will require swapping tubes and axles. Everything else is reused.
 

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Basically you would make a small extension that would bolt to the housing ends and slide longer axles in. Seems feasible as long as they were welded straight. They'd be what, 5" long or so?
 

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I could be mistaken, but one of the reasons c clip eliminators are prone to leaking is because that, bolts alone, are not robust enough to hold the bearing housing to the axle flange. The seal/rtv will eventually start to seep oil because when a load is applied, it flexes and breaks open the seal between the tube flange and the bearing housing. I'd imagine, this little bolt on extension that is being thought of, would be similar and not be able to handle the load, and eventually start to leak oil just as a bearing housing does for a c clip eliminator.
 
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