Yes. The only difference besides the inside door panel is the 73-74 doesn't have the wing vent window like the 68 -72.
Yes.
Not without modification. The 1973 and 1974 body styles are unique in the Nova series.
No
Yes.
where are the holes located in the roof of a 1972 chevy nova for seat belt installation
No
If it is the same bodystyle, yes
No.
Yes it will bolt right on.
yes, the windows dont interchange tho
8.5.
10w-40.