After removing and installing a set of springs this weekend on the '68 (fourth coil spring/control arm removal/installation) I am absolutely sold on the 5/8" threaded rod with nuts and plates method. The only improvement I have yet to make is to figure out how to tighten the nuts from the top with the control arm in place just so I don't have to spend all that time on the concrete under the car.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching