I can tell by looking at that, it'* the N/A (SE, SSE) sender. As I said, I never tried it, so this might be pure superstition... I do know that the wiring from my fuel control module (in the trunk) in the '98 SSEi is a heavier gauge, than the wire going to the pump on the '96 SSE.

IMHO, There'* usually some risk to replacing */C parts, with N/A model parts.

Do you have a picture of what the fuel sender looks like for the SC version, or a part number?
I checked RockAuto, and found that listed as fitment for your SSEi, then I checked Amazon and the part RockAuto had was listed as "This product fits your 1997 Pontiac Bonneville
Engine: 3.8L V6 Gas OHV Distributorless Supercharged SFI Electronic FI MFI
Trim: SSEi
Fitment Notes: SE"

I see that is says fitment notes SE, but I figured since it said SuperCharged, it was actually for the SuperCharged version of the 3800 II, both places had it listed for the */C version of the 3800 II

I have a supercharged sending unit from a 96 Park Ave Ultra in my 97 SE. Fuel gauge is off, everything else is fine.

Once I get a price on the all-in-one sender/pump, I'll post it up, along with the product numbers. Admittedly there is no real hurry on my part, as I won't be back in the states until December. However, I do want to get things ordered and shipped so they'll be waiting for my brother to install (at his convenience of course ) Perhaps at that time we'll be able to lay to rest the question over the correct fitment for this thing (or maybe not...)