Tim,

On a related note, the “trim” parameter in EQCompressor will do this.  

So will the “output” parameter in MangledVerb.   MangledVerb can be used as a boost/overdrive if you turn off the reverb portion.  Since it has a “mid-level” control you can kinda get into TS808 territory with it.

I’m not sure but … the “pitch amount” parameter Pitchfuzz *might* also do this with voice A.  Set voices B and C to “off”, a fuzz to taste, and delay A settings to taste (maybe off).  Vary “pitch amount” from 0 to 1.0 with expression pedal.    Set “delay level” to the left if delay is desired on voice A or to the right if no delay is desired.

Good luck!