If you do this please post some details...it sounds interesting.
Yes.
Yes.
if you modify the frame it will
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.
Yes, the same frame and basic underpinnings were used for that whole generation. The C3 (1968-1982).
The Mustang has utilized unibody construction ever since it was introduced in 1964. The frame is built into the body and floor pans. There is no separate frame like you see on full frame vehicles like pickup trucks.
No 1991-93 Mustangs use a different frame for the top.
The fiberglass panels won't but the frame can.
No.
locate on left a piller
The 64 is built on a unibody.
69had chrome bumpers, 74 had rubber, end of frames are a little different.