Just passing along some information. The 1970 Remote mirror on your El Camino is the same as the remote on my El Camino.
The 1970 remote mirror HEADS are the same. On the coupes, The door has a flat spot that the factory mirrors set on. El Caminos and Wagons have a different door shape. ( just a big curved piece of sheet metal) If you look CLOSE at your 70 remote mirror, You will see a "NOTCH" in the mirror head and a matching notch in the base.
Just make sure the replacement mirror will fit and function on the El Camino door shape. Bottom line is this:
If you ever see a remote mirror on a Chevelle Coupe that is sitting at an " ANGLE " or NOT level. The mirror head is fine, The BASE is wrong. Example... I saw a 1970 Chevelle Vert, AKA Drop Top, With a remote mirror sitting dam near at a 45 degree angle. I mention to the owner he " MAY HAVE " a Sta. Wgn. or a El Camino base. He insisted that it has the correct mirror & base. I made " No comment"
Again, Just make sure the new mirror has a head that will pivot and match the drivers side so both mirror heads are parallel.
P.S. I ordered my 70-SS 454/M-22 El Camino in Feb. of 70. It came with the D.S. remote that I ordered and " NO " mirror on the pass. side. I think around 72-73, I bought a gutter clip mirror for the right side, WHY?
I believe in order to get my truck inspected in Pennsylvania ( after a new law in the 70s) Trucks had to have TWO outside mirrors. Today my Tlr. Queen Camino, Still has ONE mirror. Took me 5 years to find a gasket for a Camino/Wgn. remote, The BASE is different than the Coupe. Good Luck.
Does the new mirror BASE match the El Camino / Wgn. base or is it a Coupe base?--