there is a lot more to it then that...what about weight, how soft the rear springs are( more squat...more neg pinion angle needed). You are correcte though sperical bushings can be dialed in with less neg pinion angle.
I know you gotta try proving you know everything. All i'm saying is give the company's a call and talk to them, see what they say, see which direction they steer you in.
LOL Ruckus is at it again.
I provided info straight from Baseline Suspensions Web site that contradicts your expert opinion.
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2004 Cobra, Whipple ,TH-400
Burning Corn
9.97 - 135.5