Pinion angle nose up, what the?

[LeadfootBob]

Here's an interesting one for you guys to ponder:
8 3/4 axle, stock length, oval track #451 springs, #079 hangers, QA1 shocks, standard rear shackles, standard shock plates/U-bolts et cetera. No sway bar installed yet.
Bolted everything together and immediately noticed two things.
A: the pinion is about 10 degrees nose up with both spring pads flat on the springs and bolted down snug.
B: the rear shackles are pointed almost straight down with the car sitting on the ground, slightly off center forward.

Tried both height settings on the hangers, no effect from what I can see.
Now what?  Space out the front hangers from the body? 12-15 degree shims?

[elacruze]

Weld new perches inboard and move the springs...

[HPP]

Did you use longer front hangers? Oval track spring front segments are only 21" unlike the stock 22" segment or SS 20" segments. So that defiently is an impact to your shackle angle. Also not uncommon to need to adjust pinion angle with such a change in spring camber that accompanies the oval track springs sets. Angle shim set can change that up in short order.

[LeadfootBob]

Yup, longer hangers (#079 is the Moperf SS hanger for a 117" wheelbase B-body).
Lifting the car up by the pumpkin the shackles point straight forward, but compressing the suspension while on the ground they move in the normal fashion albeit not too far back.
I'll try the shims, hopefully that will cure it... If not, I'm in a bit of a pickle 

If problem persists, further consultation will be necessary. If not, thanks in advance