I was going to say that this is awfully close to post-bop for 1970, but then I read that it was recorded in 1967...so maybe not so unusual.
A very good session from McLean, Woody Shaw (trumpet), Jack DeJohnette (drums), Lamont Johnson (piano) and Scott Holt (bass). It's always fun to listen to DeJohnette, especially, go all out swinging (title track) and then pull way back on the next. He knows what to do...
I dragged my feet getting this reissue, but I'm glad I found a copy. Really tremendous record and a fantastic pressing. Significant Herbie Hancock presence on this recording