Why would upper control arms be at steep angle?

[Jemo]

This is a basic question, I should probably know but want to understand this better. I have a Mustang 2 front end on my '59 and it's a kit made for this truck. The upper control arm is at such a steep angle it tore the boots on both upper ball joints. I have the ride height where I want it. It's not slammed to the ground or anything radical. Is this because the coil springs are not long enough? TCI told me the springs are 375# and have a 14" free length.

[chevy_mike]

Without pics, it's going to be hard to say but from what I recall setting up a Mustang II front end years ago, you want your ride height to have the lower arms level.

This was during mock up on my old Nova. This would be ride height and the arms are level.