What kind of fx behind chords

Sounds like a slightly crunched amp plus chorus played with a Tele type guitar...

There's a chorus and a wave form in this sound. The original tune is not so distorted as your example and the guitarplayer didn't play this "normal" d minor chord. Funky stuff with triads....

If you want to use your Gibson try pu middle position or neck with a low gain sound.

You have pm

Could be a rotary effect as well.

Quote from stfuzz

Could be a rotary effect as well.

could even be a B3-type organ with an overdriven rotary effect layered with the guitar

Is that the audio from a live video Performance? What year? What instrumentation is the band? That info could help you zero in on the FX possibilities.

I think this request is solved for Ray (The Player). I have sent him a rig with this sound:

The first two examples are only a normal d minor chord. This isn't used in Rod's old funky tune. The second two soundsamples are the funky chords.
The original sound is not so gainy as Rays example from a live gig (think it was a top 40 band or an oldie band).