How do 360 4 Barrell emblems mount?

My "Dart Swinger" emblems on my 70 dart mount on the quarter panels using those plastic retainers. I bought the car and it had been sitting for nearly 20 years. I power washed the dirt, grime, moss, and the emblems right off! I had to buy a package of the retainers to put the emblems back on. The old ones were dry rotted.