Are you talking about the lower control arms or the uppers or both? It's best to look at the complete front end as a system not just components. If we assume you are talking about the lower control arms, be careful about keeping them "Level" to the ground. What you want to pay attention to is the line between the center of the inner control arm mount and the center of the ball in the lower ball joint. Many lower control arms are made to accomodate different spring setups etc. The tubes or steel connecting these 2 points I mentioned may not really be level when that imaginary line is. That imaginary line is what is important. Although holding it level without looking at the rest of the system isn't going to get you far. When starting to look at a frontend I do like to start with those lower imaginary lines level and build my geometry from there. Sorry for being wordy, but if you are into it this deep you should do as much research as possible. I recommend the book "Chassis Engineering" by Herb Adams. It will give you a great start. Good Luck.
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