Mini-tubbing a 68 Fastback... - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 16 Old 03-16-2006, 03:55 AM Thread Starter
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Mini-tubbing a 68 Fastback...

OK i want to run some wide tires, maybe some 335s. i am curious if i mini-tube my Fastback will i still be able to use all the stock interior equipment? can i still put teh seat down and all that? I don't wanna have to modify the interior parts to make them work.
If anyone has done a mini-tub can you post some pics so i can see what you did.
Thanks

Dana


1968 Mustang Fastback 532
1984 Jeep CJ7 302
1995 Mustang GT 302
2003 F350 Super Duty 444
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post #2 of 16 Old 03-23-2006, 06:43 PM
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I minitubbed my 68 coupe. All I did was cut the flange off the rear from and move the inner wheel well all the way over flush to the frame. Gives about 2 inches more clearance in the rear of the wheel well and like 4-5 inches at the front of the wheel well. I still have leaf springs and dont think I could get a 335 in there. I'm running a 28X10.5 inch slcik on a 15X8 inch wheel with 5.5 inch B.S. If you switched to a coil over or relocated the leafies, then you'd have a better shot at that big of tire.

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post #3 of 16 Old 03-25-2006, 12:18 AM
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About the biggest tire you can run is a 315. that's about it. And there is a little more room, but too much trial and fit, who knows if you could fit a bigger one. But a 315 will.
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post #4 of 16 Old 03-28-2006, 07:13 PM
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How close can your tire be to the inner frame on the rear tire? Im also tring to get a big tire(slick) in the back but wasnt sure how much room i should leave between the tire and frame. I also wanted to use 15x10 wheels, with an offset to keep that deep dished look, but i never see any mustang guys running them in the rear. Any reason why?

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post #5 of 16 Old 03-29-2006, 03:12 AM Thread Starter
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Quote:
Originally Posted by 10secgoal
About the biggest tire you can run is a 315. that's about it. And there is a little more room, but too much trial and fit, who knows if you could fit a bigger one. But a 315 will.
is that with or without the huge lip sticking out from the frame?

1968 Mustang Fastback 532
1984 Jeep CJ7 302
1995 Mustang GT 302
2003 F350 Super Duty 444
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post #6 of 16 Old 03-29-2006, 07:04 PM
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you'll run into the inner fender and the leaf springs first before the frame. Usually the most you can get away with is 4.5-5 inches of B.S. when I moved the inner fenders, I got a 5.5 inch bs wheel in the with a 1/2-3/4 inch clearance to the leaf spring. I'll see how that works before i move the springs over any.
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post #7 of 16 Old 03-30-2006, 01:27 PM Thread Starter
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Quote:
Originally Posted by SloAod
you'll run into the inner fender and the leaf springs first before the frame. Usually the most you can get away with is 4.5-5 inches of B.S. when I moved the inner fenders, I got a 5.5 inch bs wheel in the with a 1/2-3/4 inch clearance to the leaf spring. I'll see how that works before i move the springs over any.
I am going to swap it to coilovers in the rear. How big of a tire would fit on a 5.5 inch bs wheel?

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1984 Jeep CJ7 302
1995 Mustang GT 302
2003 F350 Super Duty 444
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post #8 of 16 Old 03-31-2006, 03:07 AM
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the frame is a different offset depth in the front in comparison to the rear.
it hits the uni-body-frame member.
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post #9 of 16 Old 04-01-2006, 11:03 PM
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Quote:
Originally Posted by 10secgoal
About the biggest tire you can run is a 315. that's about it. And there is a little more room, but too much trial and fit, who knows if you could fit a bigger one. But a 315 will.
this is why he said a 315...315//35/17


with a shortened rearend and a the correct backspacing i got a 17 x 11" in the without a mini tub.



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Last edited by 12sec67; 04-01-2006 at 11:13 PM.
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post #10 of 16 Old 04-02-2006, 01:42 AM Thread Starter
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what size tire is that? 335?


1968 Mustang Fastback 532
1984 Jeep CJ7 302
1995 Mustang GT 302
2003 F350 Super Duty 444
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post #11 of 16 Old 04-02-2006, 08:22 AM
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He is runnung 315/35/17 on 17x11 rear wheels with 5.5" backspacing on a narrowed 9"...He's my hero...
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post #12 of 16 Old 04-02-2006, 02:02 PM
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Quote:
Originally Posted by rebelgd
He is runnung 315/35/17 on 17x11 rear wheels with 5.5" backspacing on a narrowed 9"...He's my hero...


Turbocharged 1967 mustang 6.96@ 99.09

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post #13 of 16 Old 04-02-2006, 03:51 PM Thread Starter
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Could you fit a wider tire in there?

1968 Mustang Fastback 532
1984 Jeep CJ7 302
1995 Mustang GT 302
2003 F350 Super Duty 444
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post #14 of 16 Old 04-02-2006, 11:35 PM
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Quote:
Originally Posted by Cobra5.0Jeep
Could you fit a wider tire in there?
no way!

i have 1/4" clearance to the leaf and inner fender and a really tight tuck on the inner of the outer fender
even with a rolled fender lip i do get little rub with a big dip but my car is also lowered with a 1 1/2" lowering block. it also still has the old stock rear leafs with rear drag shock that doesn't add a lot of support. i think with the new reverse eye 5 leafs and the same shock it shouldn't take the dip so much.

now that i think about it... i never really rubbed when i had kyb's in the rear.

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post #15 of 16 Old 04-03-2006, 12:11 AM Thread Starter
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Hmm ok. I will have to try and put my nittos on the rear of mine and see what it does. I am going to get a 9 inch and get it shortened an inch and i will run the widest tires i can.

1968 Mustang Fastback 532
1984 Jeep CJ7 302
1995 Mustang GT 302
2003 F350 Super Duty 444
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post #16 of 16 Old 04-03-2006, 01:38 AM
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fyi

my rear end is 55 3/4" from outer axle flange to outer axle flange with a 5" backspacing on the 17x11's.


Turbocharged 1967 mustang 6.96@ 99.09


Last edited by 12sec67; 04-03-2006 at 01:41 AM.
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