slammeddime
+1y
I think you should take a look at the two sticky threads. There's a lot of great info there to be read that will probably answer some, if not all of your questions. In short, no, your uppers and lowers don't have to be the same length, no they don't have to be parallel to each other, and no 3 degrees for pinion angle isn't optimum for every single situation. Everyone's situation is different and therefore no one can tell you exactly what to set your pinion angle to unless we're there measuring it with you. There isn't a minimum bar length, but you obviously don't want to get too short of bars if you want to have a larger range of motion. Hope that helps some.