I have the Hotchkis system in my Convert, and had no issues whatsoever. They are very well engineered components, and are designed to work together very well. The car sits exactly where I wanted it for "the look", with no modifications to the components as supplied by Hotchkis. I would check Summit for pricing, as I believe they are the best price out there.
You can see more pics of the stance here:
https://lateral-g.net/trush/
Good Luck
Here are some reference pics of ride height w/18 inch wheels.
