Hey Stu
Here is how mine look on my 70 GTX. I got these fron XV Motorsports. I am not necessarily promoting XV, just saying that is where I got mine. I witnessed a pair from US Car Tool being installed on a 69 Dart and not only was there much grinding and fitting required but there are places where they do NOT and will not ever meet the floor boards. Perhaps some of the gap s can be attributed to "chases" for routing brake lines and fuel lines but I didn't think it needed to be so much based on how the XV units fit....almost perfect out of the box and I had already replaced the floor pan with one from AMD.
Never could understand why guys cut "slots" in the floor to do this other than it is easier to do.