SO now I am working on just making my own spindles. This seems like the best route for me, since I can dial in exactly what I want. I found some photos of some of the Trans am spindles, I plan on using a similar design. Mono ball upper/lower joints. Ive got speedway engineering 5x5 grand national hubs and coleman sells a weld on spindle pin that I am going to start building off..
Here is the spindle I was going to steal some ideas from and build it similar to this guy.
Id like to end up in the 6 degree KPI range and zero (or less than an inch) of scrub with an 18x11.