will 89 tbird A arms and spindles work on 85 GT???

There are similarities, what I would do first is to measure the "k" frame on the mustang where the lower arms bolt and compare that to the yardbird. There are subtle differences between years on mustangs also..I would try to find somebody that has the mustang performance book, it gives the dimensional differences on specific years....I found out the hard way. Found a sweet deal on some SVO lower arms, bought the book a couple of days later, SVO arms are NOT rebuildable and ARE ~.75" wider than my 88gt..now I have some cool looking SVO arms wasting space...

If anyone can prove me wrong on rebuilding the SVO arms...pm me..

Jim