Yes it will. It will bolt right in.
No they will not. Only 1970-1972 doors will fit on a 1970 Chevelle. 1969 is only interchangeable with 1968.
No, the chevelle isn't as wide as the impala, you would have to get a rear end from a full sized Pontiac or olds.
measure the two wheelbases to find out, if they match then yes, if no you can extend or shorten the frame. 1964 Chevelle, 2 door or 4 door, hardtop or sedan frames interchange. Convertible will fit but the 2 door or 4 door, hardtop or sedan will not fit the convertible.
Not without modification
Yes. It is the exact same radio... The El Camino is actually a Chevelle model. It is built on the Chevelle station wagon frame. The entire dashboard is interchangeable between the two.
If they are of the same model type it will, check out that they are of the exact same model before trying. NO, they are definitely different body styles.
No.
Yes.
No it will not.
YES.
very possible.
Yes. It will bolt right on.