Thats a good point panic, but with only 2 or 3 guys that race in NHRA or IHRA at the sportsman level(Stock and Super Stock classes) with these engines anyway, I didn't think that would even be a market to consider. It would be legal for any of the Inliner backed races for those racers, there's a whole lot more of them there than in NHRA. The Comp classes let them run billet heads and billet blocks now, so that would be a candidate there either, with the exception of Rob Harrison in that class, he's the only one running a Chevy 6 in that class as far as I know. These engines are just about extinct in that type of sanctioned racing.