The vin has 55 , which I have determined is custom el camino 6 cyl.
What is the differance between a custom and a standard el camino?
Just purchased this car and the seat is turq. and blue leaves design.
Ugly, but is it original?
Any answers will be greatly appriciated!

The difference between a standard and custom El Camino would be the trim level. The custom's always got better apointments.

As for you're interior question, I can not answer it.