I am getting parts for my 79 brake upgrade. I am staying 4 lug and will be using 87-93 spindles with 60mm calipers and the MM upgrade kit. I want to get as close to the track width of the 87 cars. While doing research, I came across a couple of threads on other sites that list the 87-88 Tbird arms at a length of 13.75 compared to Mustangs at 13.00. Combined with the 79's narrower track, using the TB's arms should net a .25" wider track per side or .5" total over the 87-93 Mustang setup. This should provide some (mimimal?) advantage in gaining negative camber and possibly a better travel arch?? I am not a suspension expert and hoping those with better knowledge will weigh in. I don't have first hand experience with the 87-88 Tbird arms so not sure if the spring perch is the same 'depth' as Mustang and what balljoints they use.
References:
https://www.stangnet.com/mustang-for...ension.422272/
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.
http://www.svoca.com/forum/showthrea...r-control-arms -
SVO Lower Control Arms
I believe the Turbo Coupe or SN-95 (i.e.- 1994-2004) can work in a pinch. There is a slight difference in over all length from our stock units, but it is at least minimal compared to a regular Fox a-arm. The stock arms are 14" in length between the bushings and ball joint for reference. The
TC/94-99/99-04 arms are all 13.75" in length. The 94-99 arms are a step up from the TC arms due to a low-friction ball joint. The late 99-04 are deemed 'best' due to the combination of a low friction ball joint and revised geometry for better turn radius. All versions of Mustang use the same basic a-arm, so you have a large supply in bone yards if that is your choice. One issue with all of these arms is the spring cup isn't as deep as the SVO arm, so if you put stock springs back in you will need to cut them otherwise your nose will be up in the air.
Connect With Us