Safe to assume it's a Backstage Chorus?
If so, tell me what you want more or less of, and I'll see if I can pin down some simple and suitable mods.
I know folks will recommend tube amps. And yes, they can sound phenomenal. But a small solid-state stereo amp, with stereo chorus, that is easy on the back, and delivers most of the sounds you want and need, can provide its own pleasures. Certainly the Backstage Chorus 208 has a very flexible set of EQ controls.
I have two smaller SS Fender amps, one of them also a 2 x 8" stereo chorus job, albeit with a wee bit less wattage than the Peavey amp. It's certainly not a JC-120, but stereo chorus sounds nice. I also have a Champion 110, which is essentially a Frontman 25R. I modded the overdrive channel on both of them, and like them a lot more with the changes. Conceivably, some mods could be identified that make the overdrive sounds more to your liking. I'm assuming that's what's nagging at you.