Pinion Angle after axle flip etc and caltracs Q

[J1MMY]

Finally got the rear axle flipped on my '79 shortbox and once I've sorted notching the frame will be fitting drop shackles and possibly a 1" block.

I'd be interested to hear from anyone who has done similar and if they shimmed, how many degrees etc. I shimmed my S10 last year using JTR parts but have found no concrete info on '73-'87 trucks (lots on '67-'72 in the search facility).

I have looked at the possibility of raising the rear of the trans (M21) but the clearance is not there to allow.

Also, has anyone used caltracs or similar on a slammed full size to stop axle wrap?