You can put a '50 Ford front end on Genesis coupe. It's only metal and plastic.
I made a '71 SS clone out of a '72 one time. Only because the engine, trans, and body all fell in my lap at near the same time.
Here's a picture of my '72...
I bought the "running" car for $400. A friend sold me a new 350 for $100, the trans for $50, another friend gave me the wheels, front seats and carpets, and I went to the swap meet for the cowl hood and other SS stuff. In this picture I have about $1,200-$1,300 TOTAL invested in the car.
NOW, ...going back to the article. After realistically spending an additional $6K on the car to make it a '70, there's NO WAY you can tell me you couldn't find a nice '70 for the money.