Me, for one. Among others, Jeff Velde, John Calvert, RJ Sledge all have used Blair's stuff, as well as Blair himself in his '68 S/S CJ Mustang. He's doing my new S/S FE motor right now. My stocker is a 429, but FE's are his specialty. He also has been one of the few that have taken FE's to Engine Masters the past few years.
Do you watch the FE Forum?
http://www.network54.com/Forum/74182/
Ask about him there for some additional feedback.