I scrounged this from another forum, it's a how-to -fix the front end geometry on Mustangs. If you have the bucks, an MM/Griggs/ Granetelli (among others) would help fix this but if you have to run a "Stock" k-member and you have some talent, here's the fix.............

http://vb.foureyedpride.com/showthread.php?t=51322

Also, there's this little gem...

'79-'88 Mustang K-member front A-arm bolt center to center - 22.75"
'89-'93 Mustang K-member front A-arm bolt center to center - 23.75"
Mustang SVO K-member front A-arm bolt center to center - 23.00"


'79-'88 Mustang K-member rear A-arm bolt center to center - 30.125"
'89-'93 Mustang K-member rear A-arm bolt center to center - 31.125"
Mustang SVO K-member rear A-arm bolt center to center - 29.5"

'79-'93 K-member angle of A-arm off centerline of car - 16.5 deg.
Mustang SVO angle of A-arm off centerline of car - 14.5deg.

'79-'88 K-member overall width from ball joint to ball joint - 51.37"
'89-'93 K-member overall width from ball joint to ball joint - 52.37"
SVO K-member overall width from ball joint to ball joint - 53.36"

Stock Mustang A-arms '79-'93 - 13.00" long
Mustang SVO A-arms - 14.00" long
1987-1988 Thunderbird A-arms - 13.75" long.

The SVO used a special K-member to mount the '83-'84 Lincoln Continental A-arms and brakes. The '87-'93 Mustang uses a 4 lug version of the same rotor but a revised spindle design so it can work on stock Mustang ball joints. Thats why I am using a 83-84 Lincoln Continental 5 lug rotor to convert the front to 5 lug.

The reason for using this setup would be

1) Using the longer A-arms reduces the effect of the bad things that happen when the Mustang suspension cycles because it has no upper A-arm.

2) Except for the Thunderbird A-arm, which uses the stock Mustang A-arm bushings and ball joint, all the parts are stock Mustang.

3) SVO parts are becoming hard to find in good shape. Also my research says that when the stock SVO A-arm bushings wear out the only replacement is a aluminum bushing from Global West.

4) By using stock Mustang parts at a later date you can upgrade to SN95 front brakes and from there upgrade later to Cobra 13" front brakes if you so desire.

Plus in another 10 years how hard will it be to find 87-93 Mustang brake parts? Mine will be upgraded to SN95 front brakes as soon as I get the money.

Also If you use the Lincoln brakes you have to get a spacer or shim to go over the ball joint to hold the Spindle properly. But if you use the 87-93 Mustang spindle with the 83-84 Lincoln rotor and Lincoln or SVO 73mm calipers you can run the best of both worlds.