Looks like a good solid project car. I'd pay 22,000 for this car before I would pay 40,000 and up for a shiny, chromed, bondo queen from one of the bling shops. At least you can see the condition of the floor pans, sheet metal, and other problem areas that we know exist on these 40+ year old cars. As far as the engine, if your not going to concours show it, I'd say it's a non issue. I can safely say from personal experience that most people who went to the trouble of ordering a Drag Pak car drove them showing no mercy. My Buddy had a 70 Cyclone SCJ 429, Drag Pak, with a 4:30 Detroit Locker, with a removed rev limiter!! So you can imagine what a ride in that car was like. And most of them that I knew of in our area were driven like that.
So if the car listed has a period correct 70-71 CJ/SCJ or even a 71-72 Police Interceptor, bolt it up to David's transmission and be prepared to have the hair stand up on your arms as you get transported back in time to the land of the big blocks!!