Quote:

---

You can generalize through all A-body.

The body style/shape dictates the distance to the place the outer edge of the tire will rub.

67-69 Darts are just like your 68. Even 70-72 Darts are the same in the rear. And very close in the front as they take a different wheel lip moldling.

GMachineDart would be a good guy to benchmark from.

On my 68 Dart: 245/60/15 15x7 with 4.25" to 4.5" backspacing depending on small or large bolt pattern is about all the rear will take with the car lowered. My rear wheel lips are not rolled and the body has a tiny be more room to the quarter on one side.

Sure there are people that have got more, but make sure their back ends are not all jacked up.

IMHO, the springs are only about 1/2" past the inner fender. But when the rear end rolls, the top of tire tilts in relative to the body. So you need some room there.

In the front I've barely got 225/60/15 on 15x7 4.25" backspacing rim. I've got 245/60/15 with 15x6.5 rims BUT I moved the bottom front of the fender out.

Might consider some 16x7's 5.0" backspacing with 245/50/16's. Then run 1/2" billet spacers in the rear. Or maybe 17x7's and you probably will have to mess with the bottom front fender lip some. Hopefully GMachineDart has some better insight.

---

Quote:

---

Quote:

---

You can generalize through all A-body.

The body style/shape dictates the distance to the place the outer edge of the tire will rub.

67-69 Darts are just like your 68. Even 70-72 Darts are the same in the rear. And very close in the front as they take a different wheel lip moldling.

GMachineDart would be a good guy to benchmark from.

On my 68 Dart: 245/60/15 15x7 with 4.25" to 4.5" backspacing depending on small or large bolt pattern is about all the rear will take with the car lowered. My rear wheel lips are not rolled and the body has a tiny be more room to the quarter on one side.

Sure there are people that have got more, but make sure their back ends are not all jacked up.

IMHO, the springs are only about 1/2" past the inner fender. But when the rear end rolls, the top of tire tilts in relative to the body. So you need some room there.

In the front I've barely got 225/60/15 on 15x7 4.25" backspacing rim. I've got 245/60/15 with 15x6.5 rims BUT I moved the bottom front of the fender out.

Might consider some 16x7's 5.0" backspacing with 245/50/16's. Then run 1/2" billet spacers in the rear. Or maybe 17x7's and you probably will have to mess with the bottom front fender lip some. Hopefully GMachineDart has some better insight.

---

I'm going to have the full Hotchkis TVS with Dr Diff's 13" brembo-style calipers in front and 11.7" Cobra calipers in the rear. My rear end is stock A-body length.

Thanks through my research tonight, that's what I've been finding out. I was able to get more information about the wheels above. fronts are 18 x 8's with a 7mm offset and rears are 18 x 10's with a 0mm offset. He was running spacers on his Mustang so I might ask for them if I decide to pick them up tomorrow as I know the fronts won't fit. I believe rears should be able to fit fine. Worst case scenario I'll trim the lip. If I pick these up tomorrow, I might just order some new 245/40/18 tires for the front and 255/40/18's for the rear on clearance from TireRack (trying to save some money instead of forking over $2500 for new wheels and tires). I'll probably sell the fronts on CL for cheap (to recover some money) and save the 275/35/18 for the future (in case I want to mini-tub or use offset shackles).

---

Quote:

---

Typically large bolt pattern axles move the flange out 3/16 to 1/4" because they have thicker flanges than small bolt pattern axle flanges.

I'm not intimately familiar with Dr Diff rear rotors, but are they thicker where they mount to the axle than the drums you took off that 8 3/4 ?

If so, how much? If so, they makes you rear a little wider too.

---

Just did a rough measurement with the rearend in the car using a tape measure. Rotor face to Rotor face is ~59". So if a stock A-body rear is 57 1/8" drum-to-drum than I added an extra 15/16" on each side? ~24 mm? Does that sound right?

Quote:

---

Quote:

---

Typically large bolt pattern axles move the flange out 3/16 to 1/4" because they have thicker flanges than small bolt pattern axle flanges.

I'm not intimately familiar with Dr Diff rear rotors, but are they thicker where they mount to the axle than the drums you took off that 8 3/4 ?

If so, how much? If so, they makes you rear a little wider too.

---

Just did a rough measurement with the rearend in the car using a tape measure. Rotor face to Rotor face is ~59". So if a stock A-body rear is 57 1/8" drum-to-drum than I added an extra 15/16" on each side? ~24 mm? Does that sound right?

---

Quote:

---

Quote:

---

Quote:

---

Typically large bolt pattern axles move the flange out 3/16 to 1/4" because they have thicker flanges than small bolt pattern axle flanges.

I'm not intimately familiar with Dr Diff rear rotors, but are they thicker where they mount to the axle than the drums you took off that 8 3/4 ?

If so, how much? If so, they makes you rear a little wider too.

---

Just did a rough measurement with the rearend in the car using a tape measure. Rotor face to Rotor face is ~59". So if a stock A-body rear is 57 1/8" drum-to-drum than I added an extra 15/16" on each side? ~24 mm? Does that sound right?

---

Check with Dr Diff who you bought the axles and brake kit from.

Is the center section out of the rear? If not you have to bend the tape measure around and give you a bad measurement. Better to take a long straight edge against the end of the axle with the rotor clamped on. Then extend the straight edge to the floor. Mark floor. Then do some on other side. Then measure between marks on floor.

---

Quote:

---

I'm going to have the full Hotchkis TVS with Dr Diff's 13" brembo-style calipers in front and 11.7" Cobra calipers in the rear. My rear end is stock A-body length.

Thanks through my research tonight, that's what I've been finding out. I was able to get more information about the wheels above. fronts are 18 x 8's with a 7mm offset and rears are 18 x 10's with a 0mm offset. He was running spacers on his Mustang so I might ask for them if I decide to pick them up tomorrow as I know the fronts won't fit. I believe rears should be able to fit fine. Worst case scenario I'll trim the lip. If I pick these up tomorrow, I might just order some new 245/40/18 tires for the front and 255/40/18's for the rear on clearance from TireRack (trying to save some money instead of forking over $2500 for new wheels and tires). I'll probably sell the fronts on CL for cheap (to recover some money) and save the 275/35/18 for the future (in case I want to mini-tub or use offset shackles).

---

Quote:

---

My car has the very same Front and Rear Dr Diff brake package. Car is a '68 Barracuda. Front is 255/40-18 on 18x9 with a +35mm offset. This is a fitment for a 2005-2014 Mustang. Wheels cost me $150 each from "Late Model Restoration". http://www.latemodelrestoration.com/item/SVE-1007FC/2005-12-Mustang-Flat-Black-SVE-Drift-18X9


Rear I am running 295/40-18 on 18x10 with +22mm offset. This is a fitment for a 1994-2004 Mustang and cost $160 each. I am running a 1/2" spacer, but my axle is narrowed 7/8" per side from stock. These wheels would fit perfectly on my car with the stock axle width. My axle is narrowed to fit a 12" +25mm offset wheel in the center of the wheel well. The inner wheel housing is flush to the frame AKA mini-tub. So I can run 15x10 1" offset and fit 325/50-15 under the car. Likewise I can run 19x12 and a 325/30-19.
http://www.latemodelrestoration.com/item/SVE-1007FA/1994-04-Mustang-Flat-Black-SVE-Drift-18X10

Only issue with the front on the SVE wheels is I will not be able to run the plastic wheel center caps or I will have to make something special that will fit over the grease cap.

Here is a decent set of pictures showing how the wheels sit:
http://www.forabodiesonly.com/mopar/showpost.php?p=1970389961&postcount=233

Modifications to clearance front edge of front fender on the Barracuda:
https://board.moparts.org/ubbthreads/show...rue#Post8094659

Pictures the day it came home from paint:
http://www.forabodiesonly.com/mopar/showpost.php?p=1970471762&postcount=296

Here is an older picture with the 15x10 and 325/50 Drag radials:
http://www.forabodiesonly.com/mopar/showpost.php?p=1326615&postcount=20


-Michael

---

Quote:

---

An 18x9 is an big as you can fit. The front a bs of 6-6.5 will fly and a 275/35/18 clears. The rear you have to nail on the bs with offset shackles to work. If it were me with stock rear tubs I would find a set of 4 matching wheels with a bs that works in the front and just use a spacer in the rear to make it up.

---

Quote:

---

I'm not intimately familiar with Dr Diff rear rotors, but are they thicker where they mount to the axle than the drums you took off that 8 3/4 ?

If so, how much? If so, they makes you rear a little wider too.

---

Quote:

---

Yeah, also talking about this on FABO. We didn't realize the brake and bbp axles stuck out so far. I may try doing an 18 x 9" on all 4 corners with the same bs and just running 255/40/18's.

---

Quote:

---

Quote:

---

Yeah, also talking about this on FABO. We didn't realize the brake and bbp axles stuck out so far. I may try doing an 18 x 9" on all 4 corners with the same bs and just running 255/40/18's.

---

That should fit easily, too bad you are not local, I know where a few wheels are you could test fit. Do a few quick measurements on the rear, I think the 18x9 w/ +35mm to +38mm should work fine for you. I run 3" studs on the rear and bought a 1/2" hub centric billet spacer from the same guys that sell the wheels. I think they also sell 1/4" spacer. I used cheap auto zone spacers and flat washers to figure out what spacer thickness I would need. The wheels I bought are thick in the center, the 2" studs that came with the Dr Diff hubs barely made it through the lug nuts. I bought 3" studs for the front and swapped them out: http://southwestspeed.com/?sec=view_part&id=24534 I already had 3" studs in the rear.

-Michael

---

Quote:

---

Yeah, I've got the 2" stud kit all the way around. I'd hate to swap them out.

---

Quote:

---

You can't use an A body Barracuda for reference on a Dart in the rear. Barracudas rear quarters are way more forgiving.

---

But have you fit 275/35/18 in the rear with just an offset shackle move? No lip rolling or mini tubbing?

On my 68 Dart, 245/60/15 will rub the stock outer lip and I see rub marks on the top of the inner fender from the body leaning and tipping the tire inward.