- May 3, 2016
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i have a 1989 mustang coupe that was originally 4 cyl swapped to a 306. It rides like a ton of bricks. Can't tell if the original owner cut the springs or if the shocks are shot. But I want to upgrade to a good setup but all the ones I see are for a 5.0. Cool. What do I have to change to make that upgrade work besides the 5.0 spindles? If I have to do controls arms I'll do it just not sure what I need.