Yes.
Will a 1976 Corvette C3 Hood fit on a 1978 Corvette C3.
Yes.
Yes.
yes they will
yes.
Yes.
Yes, the headlights should be completely identical.
No, the 1974 Corvette frame is NOT the same as a 1975 Corvette frame. I have had customers modify it to fit, but you would have to change the rear kick up or adapt a 75 and above rear bumper assembly to make it work.
will a 1985 corvette hood fit a 1993 corvette
yes
they should as they are the same body style.