pinion angle

[redrider]

I have adjustable upper rear control arms that I want to set at the best pinion angle possible to reduce driveline vibration on my aluminum driveshaft. I have to reinforce the upper torque boxes first as they are torn from the torque from my 347.

Please let me know the best angle setting.

Thanks

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88 GT mass air conversion from 90lx, Cobra Intake(ported/polished lower),Edlebrock Heads(ported/polished),24# injectors 70 mm BBK TB, 73mm C&L, 347 SB, Wolverine custom cam, 150 shot Nitrous, BBK 1 3/4 long tubes, BBK off road H pipe, Dynomax cat back, alum driveshaft, Konis,Southside Bars w chromemoly torque boxes, 4.10 with Auburn diff, SVO springs, subs, cross drilled rotors,MSD A6 w ign retard, black magic fan etc.