Interesting thread. It is 100% Larry Young. That's obvious from his solo on Samba de Orpheus and his chord voicings on High Heeled Sneakers. I think the confusion is augmented by the gnarly tone of the organ itself because we associate Larry with that clean, precise tone of the Blue Note records. Also, he's playing a LOT of pedals on Iron City, which he doesn't do on the BN stuff. But my guess is that the organ and the material coaxed him to play it a certain way, maybe a tad more traditional than he usually did. Remember, he did two albums on Prestige that are straight up old-school JOS style Hammond before he started doing his own thing. Those two Prestige albums don't 'sound' like Young at all.