You are correct. A good friend in Springfield, Mo had 3 Dino's including the only factory race car that raced Le Mans. The one he bought brand new was this same brown and he still has it. It actually looks really great.

My 73 SS El Camino I bought new at Jerry's Chevrolet in Baltimore. Mine had those turbine wheels on it also, but they came off the first year I had it. Skinny Cragars in the front, with L-60's, on the back was the thing then.
Wish I still had it.

https://i.postimg.cc/6pdBz7Vb/el-camino.jpg

I can confirm that L60's will fit on the front, too.

K