I’m just a youngster at 62, but my feelings are the traditional customs were built with 1948 and earlier cars, and those built out of cars later than that tended to morph into show cars with modifications added just to be different to score points, most times without much thought given to the flow of the body. Look at the icon cars built by folks like Harry Westergard, early Barris Brothers, early Gene Winfield. Those cars were smooth front to back, often with subtle mods you didn’t notice the first ten times you looked at them. Most of them looked fast sitting still. The Hirohata Merc and the Moonglow Chevy were built in the same style, and it worked for them, where many others tried and failed. It was all in the eyes of the builder, and a lot of builders just didn’t have the vision. As far as using modern parts on older cars, it has been done, but most here poo poo them as street rods, which can look as good as anything else if done right. One thing that was popular for a while was using Dodge Neon headlights in fat fender cars. Not my cup of tea, but it was a custom touch. Another was the use of flush mounted tail lights, again called street roddy, but I always thought custom when I saw them if they were done right. My car? I don’t know what to call it, mild custom maybe? All chrome painted silver, removed some emblems, no skirts, single color paint. May swap bumpers end for end, for sure gonna lose the bumper guards if I can. Stock 302 with AOD transmission, very little chrome. Restomod? Really doesn’t matter to me. It’s older than I am, am building it to suit me, and don’t care who likes or doesn’t like it. It has always gotten looks and comments, some good, some bad. It’s different, just like me. When it ceases to be fun, it’ll go down the road.