12:05 Garage- ’70 Duster build

So you didn't try the ride tech spindle, right? Would be interesting to see how that all works. Did that spindle accept the wheel bearing you are already running?

The QA1 kit start with M2 spindle but they modify the steering arm. "QA1 spindles start as Mustang II components and have modified steering arms. Standard Mustang II spindles cannot be used."
I didn't try the ride tech spindle. I was leaning that way until I found the 2" long ball joint. I don't see any reason why it wouldn't work. They don't publish the ball joint taper and I found conflicting information on what Chevelles actually had. I would have called them to get more info before moving in that direction. What I have found is the circle track racers have gone through all of this and have many parts to modify control arm angles and GM spindle steering arms. The great thing about the HDK having screw in ball joints for both upper and lower is pretty much anything goes if you have enough tenacity to figure it out. Perhaps a GM spindle is the way to go since there are many options in heights and brakes. Again, this is all speculation that it will work, but I don't see any reason why it wouldn't.