[duba]

Hey guys,

What is the difference between 3 bolt and 4 bolt on the upper control arms when I rebuild my suspension for my 1967 coupe??

[Jonk67]

It's the ball joint mount holes, you can use either, I think 4 bolt was original. If you're replacing the whole UCA it won't matter unless you're trying to go for stock original points at a car show probably.
Jon

[duba]

Is there a strength difference???

[andrewmp6]

They are both the same strength ford just changed it from one to the other.