russduanegreen, your wife's Demon looks a lot like my wife's Demon LOL!
Here's my 71. Started its life as a slant six and was in California for the first 20 years. The second owner put the current 360 crate in it. He did it right. He put an 8 3/4 rear, 833 four speed, ported and polished 302 318 heads, even put the correct k-member on the car. It runs strong and is a lot of fun to drive!