I'm in the process of fitting the US Car Tool connectors on my 1970 'Cuda. I blame Brandon at 440Source for having to be under my car scraping 38 year old undercoating off in the heat of the today. I love those stroker kits!!!! Rock on Brandon!
The connectors were very close to fitting right out of the box, which was a relief after reading some of the fittment problem stories on earlier posts. John at US Car Tool is a stand up guy from my dealings with him. I spent about 4 hours on the passenger side so far to get it ready for welding.
That includes about 2.5 hours removing the old undercoating from the door sill to the transmission tunnel. I used a heat gun from about 8" away and a putty knife. It came off pretty good once it was warmed up. I still need to grind the weld areas clean. I should get it welded in tomorrow, and get started on the driver's side on Monday. I'll try and post some pictures of the process and the end result.
I'm going to order a set for my '68 and do it next. It doesn't have undercoating, and it needs the connectors because it's a convertible and with the upgraded suspension I installed, I can really feel the chassis flexing in the corners.