Auto-X / Roadrace rear suspension 1969 Valiant

All, good points to consider. Hyperco is the company that I have already contacted. No reply yet but I did the quote sheet they have online.
Preliminary thought is that the spring perches will be at 41-42” spacing (right under the frame rail). The slider will be placed on center of the frame rail and the relocation boxes in the frame will be canted to be in alignment with the toe. What I need to research is how much toe.

The AFCO attachment posted says toe should be 1.5” - 3” in. Right off the bat I am thinking no more than 1.5” for this application (non oval track car). I want to find the proper toe in. Possibly look at the measurements for E-body and see how they compare with the 1.5” - 3” suggestion for oval track setups.

Something that is a recurring ponder is if the spring perches need to be canted in-line with the toe’ed spring. If I come to the conclusion that a lesser toe-in suffices (maybe a 3/4” toe) then I think they would be fine being straight. Thoughts on that?