Yep, evidently it came out of another challenger, the previous owner threw it in on the deal. Im told it had a mild cam and did run......it looks like it has "j" heads, which are 340 heads, I think. No idea why that was done, or if they modifed the heads or pistons to account for the bigger chamber in the heads.....find out soon I guessWelcome. Should be a nice ride. Looks like you are keeping the small block too.