Does anyone know what the difference is between a regular ATI Super Damper and the Supercharged version other than the 2 keyway hub? Some Supercharger dampers have the blower pulley integrated but not all of them.
Can I use the Supercharger version that has the smooth shell and no pulley attached on a N/A street car?

here's a supercharged version: https://www.summitracing.com/int/parts/ati-918872e/overview/

and regular version: https://www.summitracing.com/int/parts/ati-917122e/overview/

The shell looks identical...

If they have different part numbers, then i would assume each one is built to dampen best in that application. Best to call them. They might even build one to suit your motor?

They do have a specific one for my engine but I could get the supercharged version pretty cheap (new!). And ATI dampers being modular it could very well be that I just need a new hub and I'm ready to go (and save more than $150).

When you order one,request a 2 inch register,Mopar uses a 2.25 register.
Also please note,when using the stock water pump housing be sure the alternator belt is NOT behind the damper!! DON'T ask why I had to cut that v belt

As I understand it, the dynamic requirements of a damper with a belt driven supercharger are much reduced, as in the supercharger system acts as a partial effective damper, almost to the point its not needed, meaning to me, using a "supercharger" rendition on a NA motor might mean you are not effectively damping your crank/rotating assembly. Of course that does not answer your question, but should be a consideration in your research..

Me thinks that SB Chevy blower dampener won't fit on any stock Mopar crankshafts
I've talked to ATI on their dampeners many times, they always recommend using the heavier 3 ring steel outer shell instead of the lighter 2 ring aluminum shells they sell for BB Mopars, especially on drag race motors with steel rods and standard weight crankshafts
If you have any questions about their dampeners any time, contact them