I had a cj5 with a very hot 1971 401 in it. At the time the Chevy boys were proud of their 2.02" intake valves.....I ran 2.02" EXHAUST valves and giant intakes. That 401 made just a few ponies shy of 500 hp and was utterly impossible to drive.

I miss it today, all 6 mpg tops.

A built AMC 401 can be in the 500 plus club real easily.

Originally Posted by BrentD

I would not buy something that runs on any kind of primer given the possibility of primer shortages and even regulations. In fact, why not buy a flintlock? Really. Rocks aren't going away anytime soon.