Hi @USSAL,
Here is a suggestion of what you could do. I purposely kept the same case size, power supply, and general vibe that you started with. To me this feels like a fun basic subtractive synth setup. @JimHowell1970 mentioned a lot of good points that needed to be addressed, and I think this example rack takes care of those pretty well for the size of case we're working with. I focused on using similar but more compact modules or ones that provide more functionality than those that were in the original rack. I also added some desirable functionality that wasn't present: mixers, attenuators/attenuverters, S&H/T&H, clock source, slew limiter, noise source, more VCAs, LFOs, envelope generators... and a bitchin' reverb.
There's a lot that I could say about the choices I made, so let me know if you have any questions. But here are some quick notes: The Disting can act as a quantizer or many other utilities that you might find you need. I think it might be difficult to get the original Polivoks filter that you had in the original rack, so I replaced it with Erica Synths' newer one.
I hope some of that helps!
Chace