Pinion angle

technically yes.....Usually the trans is fixed so you can only adjust the pinion angle from rotating the rear.......So I would use whatever angle you have off the back of the trans......And make the rear pinion angle opposite that one.....And yes, depending on what rear suspension you are using you can go more......Ex. if your rear tail shaft is at 1-1/2 degrees up you need to be at least 1-1/2 degrees down at the pinion yoke...I would add a degree or two down for leaf springs as they allow the most wrap up.....This is where a pinion snubber comes into place though, if you are running one and have it adjusted pretty close to the floor you won't get much wrap-up