The concept of funk confounded 70s hard rock groups like Zeppelin & Deep Purple...they tried and failed...often spectacularly.
The groove on this one is pretty good.
the bass parts are good - perhaps a little EQ peak at 3K, (just a couple of dB and a narrow Q), will bring out the best in it.
maybe a little volume automation to emphasize "the one" on the bass n drums. The backing track is pretty cool though.
The intro sounded messy and unfunky - not the place to start a funky piece - it also ends quite abruptly. I think, generally, the lead guitar is trying to hard and missing the point. Listen to some of Prince's jams. Playing four to the floor over a funk backing can work but not for extended times. I'm undecided about the sax.
I listened to the inspiration and it, too, has an intro messed up by delay & reverb. Much of the guitar part on the inspiration does the spaces as well as the notes well. That may what's missing on your track.
Jeff Beck & Jan Hammer were doing this sort of thing when I saw them in the late 70s.

Cheers
rayc
"What's so funny about peace, love & understanding?" - N.Lowe