Working Angles Question

[NovaPwr]

Last winter I swapped some 3:73's into the Nova. Spring came and I had a vibration at speeds over 65 or so. Read all the threads I could and added 2 degree shims and tried it. Better but still present. Tried 4 but feel it was worse so I went back to 2. Had some family medical issues come up early summer and I never got back to it.
Took readings this weekend and I can't figure out for sure the working angles. The engine on the flat area the starter mounts to reads 3 1/2 degrees, back of engine tilted down. Driveshaft is at 0 degrees. Pinion is pointed up 1 1/2 degrees. From that, can someone point me in the right direction?

Thanks, Dave