I'll look into the suspension posts on Hamb, since I'd never claim to be a suspension expert. Thanks for the tip.

I'm fairly certain that the designed ride height is with the upper A-arm horizontal, since it coincides with a stock Ride Tech shock wave length of 11.8 inches and it now looks like the ball joint is sitting around mid-travel. I'd have to drop the car even lower to get the lower A-arm horizontal and it's already about 3/4" lower than I ever used during my test drives.

One thing I've found with those selling hot rod parts is they all seem to act like Schultz on Hogan's Heroes (I know NOTHING!). I got a call from ride tech today. They got the screwed-up upper A-arm that I sent them and told me that it was fine because it fit their welding fixture. I told them to take the arm to someone in the shop with real machining or engineering experience (like I have) and they could easily tell what was wrong - the threads for the rod ends are not parallel. I got a call back in about 15 minutes telling me that they would make me a new A-arm. It was obvious what was wrong, but they tried hard to convince me that I should accept an A-arm with crooked rod ends, since nothing is perfect.

I also complained about what I have to assume is their choice of spring rate for the coil-overs that I got from Oze. They really had nothing to say about why I got 450lb/in springs, when they should probably be 350lb/in. I told them that by now I was used to paying for other people's mistakes - trashing parts that were useless to me and buying new ones. I expect if I want some softer springs, I'll be buying new ones.