Years ago I made up all my brackets so both bars swung in an arc to not change their length or pinion angle. I laid the whole thing off on a 4x8 sheet of plywood, chassis, rear, tires, shocks and brackets-bars at the ride height I wanted. Then plotted most of the ICs on the board. After I got car completed and weighted I could transfer the points from the board. Check your bar length as that could change the equation (example like 20” and 25” long bars)