As i read it, you're considering swapping the SC engine into a 3.8 n/a car.
Do keep the SC trans, the 3.8 n/a trannys are even weaker than the 94 SC's.
Consider beefing it up, while its out, see the articles section.
Most n/a's have a little 7.5" open rear pumpkin, so plan on swapping that, too,
[its no sweat at all], and throw in some steeper gears, while you're at it.
Some n/a's had 4w disc /ABS and trac-loc, but it is rare.
The n/a fuel pump is way inadequate, the SC pump just adequate for stock,
and if you're planning to tweak it up to compete with a hot 350, get a 190 or 255 Walbro fp to start with.
I'm not too wise on wiring, but i know you'll need to use the SC EEC, and most of the SC underhood wiring [sensors, DIS, ircm, fans, etc.] so some careful study and some splicing and pin switching may be required to integrate the SC engine harness with the n/a car harness, but probly not too major, if you can read & follow the EVTM manual allright.
3.8n/a's are generally a lot lighter than SC's, so there's one advantage, anyway.
Don't ya give me no Buick.
Son, you must take my word;
If there's a God up in Heaven,
He's got a Silver Thunderbird.