You should pick up the Sony Japan SACD that has the discrete quad mix. It's a bit pricey but a blast to listen to.I like this one a lot too! I've had it for quite a while, but had never before heard it in quad. BTW again these Epic albums surprise me, the Involve SQSM gives me a nice surround stereo in SQ mode both from the labeled "Stereo" US vinyl LP and the late 80's / early 90's CD.
I think this must be one of the earliest released recording with Cozy Powell on drums (another Brummie who's style I just looove) he has a groove, but at the same time he sounds heavy, like he means it! The whole album has the Motown feel to it, wasn't JB also "visiting" some Stevie Wonder sessions?