I am going to look at a 1972 Duster this weekend. No motor or transmission in the car. Owner said that it was a slant six car but now has a V8 K-Frame. How can I tell if it is a V8 K-Frame? If it is a V8 K-Frame are they all the same? What I want to know is could I put in a 340 or 360 if it was...