The consoles were different and so were the rear quarter interior panels. The 1970 console has no ashtray at the rear, it has a seat belt buckle holder. The 1971-1974 consoles had an ashtray at the rear instead of the place for the seat belt buckles. The 1970 rear interior panels each had an ashtray in the small armrest and the 1971-1974 rear interior panels did not have ashtrays.
You're right - the upholstery changed patterns a bit. According to Legendary, the 1970 and 71 leather seats were the same, but the cloth and vinyl seats were different. Dave is correct, the 1970 dash pad is unique in that the Challenger script is embossed. The 1971-74 dash pads had a flat spot a script emblem was stuck on.
The rear interior panels in my ´70 Challenger have no ashtray in the small armrest. (Strange car....No wood-grained inserts in the door panels, no ashtrays....Maybe it has something to do with the fact that my car was built quite early: September, 1969 I think)
I have two examples of 1970 interiors, an R/T and an R/T SE and have seen others with rear interior panels with ashtrays off both assembly lines, LA and Dodge Main. I can't figure out why some 1970's have the ashtrays and why others don't.
I will tell you what is on my rear interior panels. On top of the 'arm rest' part of the panel (if that's what it is) there is two small screw holes on each side. I do not know what was once fixed there or if it was factory or not.
The examples that Jack has is proving to be interesting. I am beginning to wonder if the rear panels on the examples he has are early 71 on late 70. I spoke with my brother in-law about this the other day. He looked through shop manuals and seems to believe that they are 71 panels. They do fit about the same.Thereis no evidence that supports ahs trays on the 70 model as far as he knows. He has worked as a wrench for Dodge dealerships for over 25 yrs.
I have a question about the rear opening of the ´70 center console. The rear opening looks so empty on my console (it looks as if something is missing). Is it supposed look like in the pic below, or am I missing some part?
...and another question: Let´s say that you do a minor mod on the ´70 console. Is it then possible to make the ´71-´74 ashtray fit? (maybe not recommended as it probably will decrease the value of the console....)
I keep snapping off the edges of the hole on mine. I have to carry one slick on the back seat and it often hits the console there.
I guess customers thought the hole was ugly too. Plus there was no place to put a shoulder belt buckle. You have to always keep in mind that the 1970 Challenger was rushed into production. They just never had time to get the details (or the quality) right.