Sorry for your pain.Been there done that I put flow techs on my Dart I wound up denting them for clearance as well . I now have a set of Doug's . I can't get rid of the flow techs.
I didnt have any trouble with the flow techs on my dart, the fit was good with no dents. Have a mini starter and a 4 speed. The coating is shity already starting to surface rust between 3 and 5 cylinders.