Thank you to everyone in this thread.
We worked extra hard on our subframe connectors to make sure they give our customers the most clearance and the best performance.
We always recommend welding in subframe connectors towards the end of the build. Ours are designed so you can bolt them in if absolutely necessary, but for maximum strength it's best to weld the bolt holes and if you're committed do a small perimeter weld around the front and rear backets. Because the welding is minimal and there is no cutting or relocating required, Hotchkis subframe installation is easily done on a freshly finished car. As for when to install exactly...how about "before the first burnouts"?
Many of our customers have had luck with Muffler shops doing the install. Just remember that it's critical that the rack they use is a drive-on rack where the car sits on the wheels with its full weight. Lifts that pick the car up by the frame don't work as the frame will not be settled correctly.