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Re: A-body 73up disk swap, How much does track width change
[Re: Jim_Lusk]
#925665
03/08/11 02:37 AM
03/08/11 02:37 AM
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Joined: Jan 2003
Posts: 949
Klamath Falls, Oregon
Dartslantsix
super stock
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super stock
Joined: Jan 2003
Posts: 949
Klamath Falls, Oregon
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Quote:
Wrong. The k-member dimensions are exactly the same from 67-76.
I just leafed through Tom Condran's book. He states that all A-Body lower control arms are the same length. If what you're saying about the K-frames is true, does the extra width come from the knuckles?
Maybe I've misunderstood something.
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Re: A-body 73up disk swap, How much does track width change
[Re: Dartslantsix]
#925666
03/08/11 03:36 AM
03/08/11 03:36 AM
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Joined: Mar 2003
Posts: 18,678
Fresno, CA
Jim_Lusk
I Live Here
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I Live Here
Joined: Mar 2003
Posts: 18,678
Fresno, CA
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Quote:
Quote:
Wrong. The k-member dimensions are exactly the same from 67-76.
I just leafed through Tom Condran's book. He states that all A-Body lower control arms are the same length. If what you're saying about the K-frames is true, does the extra width come from the knuckles?
Maybe I've misunderstood something.
The extra width comes from the location of the rotor on the spindle.
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Re: A-body 73up disk swap, How much does track width change
[Re: Fab64]
#925668
03/08/11 09:42 PM
03/08/11 09:42 PM
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Joined: Apr 2010
Posts: 1,216
Under My Car
Mopar_Country
pro stock
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pro stock
Joined: Apr 2010
Posts: 1,216
Under My Car
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Quote:
Actually, I have not personally noticed the extra width up front, and I was surprised when I read it here. That's why I decided to ask about it.
I just looked on-line, and found the following track widths:
1967 Barracuda - front 57.4, rear 55.6
1975 Dart - front 59.1, rear 55.6
This matches what RobX4406 said, above. Assuming this is correct, the rear track did not change, but the front track on the 73-76's is wider by .85" on each side (that's just under 7/8", which is .875").
Jim, all three of your cars look fine to me. Are they each running the same width wheels in front and back?
Sources:
1967 Barracuda
1975 Dart
My car is a 74 and there is a noticeable difference from front to rear track when standing behind it. I kinda wondered why myself.
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Re: A-body 73up disk swap, How much does track width change
[Re: MileHighDart]
#925669
03/10/11 01:46 AM
03/10/11 01:46 AM
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Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
Rick_Ehrenberg
top fuel
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top fuel
Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
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Some trivia...
> When the "bulged 1/4 panel" A-body came out in 1970 (Duster), the engineers wanted a wider axle housing. Bean counters quashed it. Everybody commented on how "lost" the rubber looked on 1970 Dusters (rear).
> Then, in 1973, when the 4.5" BC / slider brakes (wider track setup) came out, the Duster / Dart Sport looked so silly (stock) with front wheelhouses looking "full" and the rears "empty", that there was actually a TSB telling service managers that this visual effect was normal. Which it was.
Comments above, re: basic body dimensions and suspension components unchanged 1967-'73, are 100% correct.
Rick
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Re: A-body 73up disk swap, How much does track width change
[Re: Rick_Ehrenberg]
#925670
03/10/11 01:51 AM
03/10/11 01:51 AM
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Joined: Jan 2003
Posts: 75,050
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,050
U.S.S.A.
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Quote:
Some trivia...
> When the "bulged 1/4 panel" A-body came out in 1970 (Duster), the engineers wanted a wider axle housing. Bean counters quashed it. Everybody commented on how "lost" the rubber looked on 1970 Dusters (rear).
> Then, in 1973, when the 4.5" BC / slider brakes (wider track setup) came out, the Duster / Dart Sport looked so silly (stock) with front wheelhouses looking "full" and the rears "empty", that there was actually a TSB telling service managers that this visual effect was normal. Which it was.
Comments above, re: basic body dimensions and suspension components unchanged 1967-'73, are 100% correct.
Rick
Sounds like a 68-70 B body rear would be right at home under one ?
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Re: A-body 73up disk swap, How much does track width change
[Re: JohnRR]
#925671
03/10/11 01:58 AM
03/10/11 01:58 AM
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Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
OzHemi
Penguin-hating Ginger
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Penguin-hating Ginger
Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
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Quote:
Quote:
Some trivia...
> When the "bulged 1/4 panel" A-body came out in 1970 (Duster), the engineers wanted a wider axle housing. Bean counters quashed it. Everybody commented on how "lost" the rubber looked on 1970 Dusters (rear).
> Then, in 1973, when the 4.5" BC / slider brakes (wider track setup) came out, the Duster / Dart Sport looked so silly (stock) with front wheelhouses looking "full" and the rears "empty", that there was actually a TSB telling service managers that this visual effect was normal. Which it was.
Comments above, re: basic body dimensions and suspension components unchanged 1967-'73, are 100% correct.
Rick
Sounds like a 68-70 B body rear would be right at home under one ?
Not that they are really available around here, but the later (VH-onwards) Aussie diff was a tad wider than the earlier ones. I don't have the specs off the top of my head, but I would say about a 1/2" or abit more per side.
My last VG (now 68hemiB's) had a later diff in it, and a factory steel wheel just made the tire about rub the 1/4 panel...
Since the later cars were rounded compared to the earlier cars (sort of like what happened here) they actually did go with a wider diff there though.
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Re: A-body 73up disk swap, How much does track width change
[Re: OzHemi]
#925672
03/10/11 02:09 AM
03/10/11 02:09 AM
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Joined: Jan 2003
Posts: 75,050
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,050
U.S.S.A.
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Quote:
Quote:
Quote:
Some trivia...
> When the "bulged 1/4 panel" A-body came out in 1970 (Duster), the engineers wanted a wider axle housing. Bean counters quashed it. Everybody commented on how "lost" the rubber looked on 1970 Dusters (rear).
> Then, in 1973, when the 4.5" BC / slider brakes (wider track setup) came out, the Duster / Dart Sport looked so silly (stock) with front wheelhouses looking "full" and the rears "empty", that there was actually a TSB telling service managers that this visual effect was normal. Which it was.
Comments above, re: basic body dimensions and suspension components unchanged 1967-'73, are 100% correct.
Rick
Sounds like a 68-70 B body rear would be right at home under one ?
Not that they are really available around here, but the later (VH-onwards) Aussie diff was a tad wider than the earlier ones. I don't have the specs off the top of my head, but I would say about a 1/2" or abit more per side.
My last VG (now 68hemiB's) had a later diff in it, and a factory steel wheel just made the tire about rub the 1/4 panel...
Since the later cars were rounded compared to the earlier cars (sort of like what happened here) they actually did go with a wider diff there though.
Jeff that car is not the bulged 1/4 A body Ebooger speaks of , they would be duster , demon , dart sport , the car in the pic is the same as the 67-69 A bodies
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By the way "milehigh" your Dart looks really good with those wheels on it 
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