Yes I have a 64 and repairing the quarters with 65 skins. They are identical.
Yes
Yes
No, 2 differen't body styles.
Yes. They should bolt right in.
A standard Chevelle frame will not fit an El Camino as it was based on the station wagon frame
'64-'67 Station wagon or El camino frame.
yearone.com and you can use the fusebox from the regular 64 chevelle, it's the same.
about 250 horse.
64-65-66-67 chevelle.
64/4*3=48
16.
16