You will want to tighten the control arms with the suspension at ride height, but the new bushings will wear in during the first miles on the arms. Let me know if I can assist further.
-Steve
952-985-5675 x468
As the tech who's tasked with monitoring FABO, sorry for the delayed response. The correct UCA part number for your 67 Dart is 52303. I am available anytime on the tech line at 952-985-5675. Ext 468.
Thanks,
-Steve