Anyone know where the fuel fill cap is located on the "58 Chevy in the pic?

 

If this is a trick question, I beleive it is either behind the license plate or on the left middle part of the rear bumper behind the little flap.

I prefer the fill caps on the 57's because those were in a hidden chrome flap on the back of the fin, I thought that was a little more ingenious

 

You are correct sir.....just left of the center panel above the license plate. The '56 had an interesting location too. And the Caddy's were also sometimes a pain to find.