Driveline and Pinion Angles

Just installed my new Espo +2” leaf springs. My pinion angle just got worse... no fault of Espo. Previous owner matched perch angle of the 7-1/4 he took out (supposedly) cause it was a B body 8-3/4. So I will be chasing some driveline angles throughout because the transmission to driveshaft angle goes upward (don’t ask how cause I don’t know). Car is 1972 Duster swapped from slant 6/904 to 340/727. So its using swap mounts for the engine to K frame. Using a 73 spool trans mount but I bought a 72 trans mount to swap in so easier to shim transmission.

So before I start shimming rear axle how many degrees of pinion angle does everyone have? Im about 5 degrees down at the front currently. I know all cars are different and rake affects that angle. Anyway, considering going with 6 degree shims and them with raising back of transmission that might work?? I’m confused... maybe.