Rough? It doesn't matter if they are any good. They are a props. George Barris made props that if you looked too closely, you might not like what you see.
It was made into a modified stocker that I believe did the most body damage. The snapper came after a reincarnation of the street racers of the '80s. The 1974 promo seemed a little better, but the front wheel openings really took a beating after being made into a modified stocker (you can see wavy beltline along the body). Better headlight openings can be found in the separate Revell 1970 grilles.
It's a sad commentary that China controls all these kits like they belong to them . It's hard to believe that they act like they own all of Revell's and AMT's creations.
I never thought about using the AMT for the 72,73 and 74. But since Hart's has the conversion pieces, it seem to be a good solution. I was looking at the Lindberg 72-74? Challenger kit. You might not be happy with the simple plain chassis.
Steve, you sure brought that 71 Impala back to it's former glory. I thought about converting mine to a Caprice using MCG scripts and redetailing the grille. It's too bad nobody has reissued this car.