Any '74-'80 Chevy HEI distributor will work. The biggest thing you have to do to add HEI is to run a larger positive lead to the coil. The small gauge wire running to your stock coil isn't large enough to carry the proper amount of voltage for the HEI coil.
YES.
No. It will fit the 1966 and 1967 Chevelle only. A 1967 Skylark hood will fit if you can find one.
no
I really doubt it.
should be the same identical frame as they are both A bodies.
No.
Not without some serious modification. Use a rear end out of a '64-'67 GM A body instead. They are stronger and will bolt right in.
No it will not.
very possible.
Yes. It will bolt right on.
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.