tubular upper control arms???????

When I rebuilt the front end of my 69 Dart that had sat outside for 27 years, I discovered the upper control arms were rusted beyond use. Since it is to be a race car only, I purchased a set of tubular units from Mancini. I've bought stuff from them since the 70's and have been treated well BUT...the directions were limited. Directions say to place 4 flat washers in front and 4 in the rear of each heim end to take up space and to make them equal. Problem is that the space is different from the front to the back so I put the same on the left front as on the right front and the rear ones as well.
But that's not my biggest problem! The arms are supposed to achieve 5-7 degrees of positive caster by using a combination of turns on each heim end and the cam bolts. Where should I start turn-wise on each end to get my desired specs? If I guess wrong, that means multiple trips to the alignment rack and maybe even having to yank the torsion bars (again) to get the arms out easily.
I run 6 degrees of positive caster and 0 degrees of camber with an 1/8 inch toe-in. With this setting and the stock arms I could take my hands off the wheel @ 120 and it was on rails, both on and off the gas.
Can I get a lil Mopar help please?​

A good alignment shop can take care of it without taking the T-bars out. They will put a jack under the LCA close to the wheel to take the weight of the car then take the cam bolts out, make the changes to the threaded rod then put everything back in. Don't know who makes the Mancini stuff but RMS has installation instructions that say where to start.

Larry