Strange S60 Rear End Help

I am ordering a new Strange S60 Rear End for my 72 Dodge Dart drag car with Mini-Tubs and a Narrowed rear end. I need to give Strange the Pinion Angle for the build before they weld on the leaf Spring Mounts. I don't have the Engine or Transmission built yet, so I don't know my driveshaft angle. It's a 440 block, with 727 transmission. The car will be set up to run mid-10's.

Can an experienced Big Block A-Body guy (person) tell me how I should have Strange position the Pinon Angle as they weld on the leaf spring mounts? I don't mind fine tuning with tapered shims, but I don't want to use more than one on each leaf.

Appreciate any thoughts or advice you have. Thank you,