Ross, the transmission was 6 degree down, driveshaft 5 degrees down and pinion is 7 degrees down.
So given these numbers, I don't think you are bad at all with static numbers, but under any acceleration, as I said in the other post, without some sort of traction bar, you are likely over-centering a little as the pinion comes up. My guess is with even the slightest acceleration you are likely tranny 6, driveshaft under 5, and 5 or even less on the pinion. Numbers don't look bad but that pinion will always be trying to unload as load changes and on hard acceleration could be rising a lot more
This isn't the greatest video, but take a look at how much pinion angle can move, just on the street
https://www.youtube.com/watch?v=54_6GaYJvWIIf you are confident in your numbers, my choice would likely be to leave it as is and add an cheap under-rider bar. However, if I was tweaking it, I'd likely add a little shim under the rear tranny mount, to the point where I didn't have to cut, just to correct back a little more. Not sure if you could get to tranny 5, driveshaft 6, and leave the pinion alone but control it with the bars, that likely would work out pretty nice there without cutting the floor (assuming you have good fan clearance).