[chiphead]

Got one of those Klein digital angle finders. Man that thing is nice.

With the front end on stands higher than the rear, the front U-joint angle was 3.5 down. Once I got the 4 tires sitting on the blocks at ride height, the front angle was 2.6 degrees down. Rear pinion angle didn't change much, so yeah, weight on the tires matters.

The important thing is the rear end isn't 2.6 degrees up like it should be, it was 2 degrees down. Welp, there's the problem.... I think the issue is threefold:

1: Upper ears on ford 9" rear in different location than stock BOP
2: Ford 9" has low pinion vs BOP
3: Car is lowered vs my other car. Apparently on a 4-link that pivots the yoke downward as the car sinks.

I was wondering why the upper arms were set longer than stock when I removed the rear from my donor car. I set them back to stock for a '67, I've now re-learned that's not right. Tonight I cranked the upper arms about 4 turns out, the pinion angle is now about 2.9 degrees up. Driveshaft is about 0.8 degrees down now. It's late, I'll finish up another day. Will likely set pinion to 2.4 degrees up and see how she rides.