I just finished restoring my convertable. No rotisserie . 200K on the car. I put the last 100k on it and did not pamper this car .The factory door to quarter top gaps were too tight. Jack stands under control arms up front I put the rear stands under the front rear leaf spring perches and let the rear end hang to open the gap a little too wide.. I held my breath when I welded my connectors in. When I sat it down on all fours and my gap was perfect both side. Whew! Aside from that one time, I would always weld connectors with car sitting on the suspension.