If you try to sell that car in the future w/out the original "badge" i think you would have a great problem. You need to document ,before you pull it,with pics and witnesses and possibly a notarized statement that the badge is the one that came on that car. If I were going to buy a El that was supposed to be a ChooChoo it would need all of the above for me to even think about putting Choo Choo money in it. I have a 86 ChooChoo and looked at that very hard when buying it.
Yeah but that's an original unmolested one. Most times previous owners didn't know or care. Look how many still swear it's a monte SS nose.
But like anything else if you care enough to search out a pristine very original unmolested car, you really are going to be concerned with authenticity.
Strngely, I very rarely see a perfect unrestored el camino. Or even a factory correct resto for that matter.
So far I've found El Camino Choo-Choo's in white, black, blue and burgundy. Try putting some 3M clear packing tape over the decal before removal. This will help the decal stay together even if you get some tears during removal. Also, you can read all over the internet that 4950 El Camino Choo-Choo's were made. I believe it's probably half that number. If an El Camino was ordered without the RPO-Z15 Super Sport package, and many were, Choo-Choo Customs added the decals during the conversion process.