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Old 10-07-2008, 11:39 AM   #1 (permalink)
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I plan on doing a mini tub on my fastback, just wanna move the wheel wells in like 2 inches or so, and flush them with the frame rails, anyone have an pics of the process, or a how to or just any tips?


Thanks
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Old 10-07-2008, 04:55 PM   #2 (permalink)
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Sorry I dont have pics but its pretty straight forward to do. Ive done this on two of my Mustangs one a 67fb and the other a 65fb. I cut the ridge off the middle of the factory wheel well then I cut the inner wheel well from the trunk/backseat floor.
You will also have to cut some bracing away from the inner well, just be sure to reweld it back to the inner well after you move the well inboard. You will have to cut out the rear end snubber and relocate it somewhere else since it will likely hit a bigger wheel.
Cut or buy a piece of 16 gauge sheet metal that will fit the entire length of the wheel wells front to back. I usually go with about 2" of separation between the inner and outer wells.
After repositioning the inner well tack it down then use your sheet metal strip that should be about three inches wide and position it in the gap between the two wells and tack weld into place.
On this last car I did this on I found a shortcut {for me at least}. On the bottom of the inner well you will have two options after you move the well inward. One is to cut the excess metal of the trunk/backseat floor flush with the bottom of the inner well or what I did was just trim it to within an inch of the well and hammer it up under the well and then ran a welded bead around the outside of the inner well. This save me time and lost flesh since on the other car I trimmed it flush and the sawzall kept grabbing and beating my hands into the sharp metal.
After you get everything welded back up be sure to buy some seam sealer and fill in all of the seams. Also I dont like to go more than 2", maybe 3" tops on the width otherwise you will have to modify your inner panels to make them fit.
Lastly since its a 65, to get the full advantage of this mod you will have to think about one of the rear coilover kits on the market. Since the leaf springs will hit the wheel way before it is even close to the relocated inner wheel well.
I dont think Ive left anything out.....hope this helps, Mike U
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Old 10-07-2008, 06:44 PM   #3 (permalink)
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Mustang Depot has an article... google - mustangdepot mini-tub
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Old 10-08-2008, 12:34 AM   #4 (permalink)
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Good writeup Mtrain. Very similar to how we did the wife's 68 Fastback. Only thing we did different was that we cut more metal from the front of the wheel tub than the rear, thus gaining more room in the front of the tub. This is where a tire will rub in a stock wheeltub, and since we are stuffing 315's in there we didn't want to take any chances. I also agree that 2" is about max so you don't have to mod your interior panels.
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Old 10-08-2008, 01:51 AM   #5 (permalink)
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There are some pics on my mini tub page

I took mine in about 1 1/8" no point in me going further unless I moved the springs, which would mess up the handling of the car.

The interior is slightly tight in some areas, however fits very well fot the most part.

I used a carpenter's square on the axle flange to determine how far I needed to go.

The leaf springs are on a slight angle. The rear most portion of the leaf spring dictates the width of the tire.

Good luck
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Old 10-08-2008, 02:26 PM   #6 (permalink)
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Thanks Guys...

I don't really mind modifying my interior panels, I was planning on getting the rear Shelby Shelf, or just not having anything in there at all, because i will be putting in a roll cage. I would like to fit some 12" or 13" wide wheels. So with a 2" to 3" flare, and a mini tub, do you think this is possible.

Oh yeah I already have a rear 3-link with coilovers so I don't have to worry about the leaf springs anymore.
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Old 10-09-2008, 05:00 PM   #7 (permalink)
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This should be right up your alley! Here's some nice pics of a 65 fastback project. I'll be doing this down the road myself.

Mini Tubs
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Old 10-09-2008, 11:14 PM   #8 (permalink)
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Quote:
Originally Posted by Rockymtnmare
This should be right up your alley! Here's some nice pics of a 65 fastback project. I'll be doing this down the road myself.

Mini Tubs
Thanks, that is exactly what I needed
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Old 10-09-2008, 11:57 PM   #9 (permalink)
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Oh god, I'm such a noob so okay, I'm just going to ask. What is the purpose of doing a mini-tub modification? Thanks.
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Old 10-10-2008, 12:51 AM   #10 (permalink)
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Quote:
Originally Posted by aolshove
Oh god, I'm such a noob so okay, I'm just going to ask. What is the purpose of doing a mini-tub modification? Thanks.
W-I-D-E-R wheels/tires to begin with....
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Old 10-10-2008, 12:24 PM   #11 (permalink)
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I understand the widening of the wheels wells, how about the leaf springs, how do you relocate these?
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Old 10-12-2008, 11:16 PM   #12 (permalink)
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Most of us just replace the leaf springs with something else. I am using the TCP G-link rear suspension to gain a little more clearance.
David.
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Old 10-14-2008, 02:48 PM   #13 (permalink)
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I went thet coil over route. I bought inner and outer wheelhouses seperate and added 3" between them. The frame is slightly notched, welded shut and gusseted.







You may not need this much room. I am running a 12" rear tire and the car sits lower.



Have fun,
Brent
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Old 10-14-2008, 03:04 PM   #14 (permalink)
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Quote:
Originally Posted by EX427COBRA
I went thet coil over route. I bought inner and outer wheelhouses seperate and added 3" between them. The frame is slightly notched, welded shut and gusseted.







You may not need this much room. I am running a 12" rear tire and the car sits lower.



Have fun,
Brent

I would like to have 12" wide wheels in the back, you can fit it all just with the 3" tub job and slight modification to the rails? Do you have any more photos of the rear rails, some close ups?
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Old 10-14-2008, 03:39 PM   #15 (permalink)
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The wheels are 10"X18s" and the tires are Goodyear Eagle F1s with a 12" section width. There are more pics here:

http://www.cardomain.com/ride/2659961

Brent





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