I did read that the Indivision has a Denise built in but I thought it was a regular one. Also if it has the Denise why would it need a Denise plugged in to the Indivision board?
BTW, I have tried a Super Denise in a 4.3 and works just fine
Probably better off just grabbing an Indivision ECS (which gives your machine SuperDenise capabilities as well as a scandoubler/flickerfixer.)
Unless of course you already have an A2320. Those are pretty decent.