69 Barracuda Clutch Shake Help Needed.

Got my angle finder today. I get 5 degrees negative. Measured my 71 Cuda 340 4spd car with 8 3/4 and got about the same thing. The 71 has no issues. Has anyone here actually have or know of a situation were positive pinion angle caused take off issues only. Everything I have read about the subject suggests I would have vibration at various speeds as well. I don't have that at all. Very smooth driving car other than take off at standstill in 1st gear.

5 degrees negative in relation to what? What is the angle of the transmission centerline and the angle of the pinion centerline?