If it is a ls engine and possibly a miscommunication on the car it came out of there are parts available to convert ls engines to run with a 4 barrel carb, so no electronics. Makes for a pretty cool old school look when set up with a high rise intake and good headers and tons of power too. It sould like odds are it's a LT as others have stated, but don't worry I won't laugh at you these things happen. It's not a bad things if it is from the 80s tho, I've read a few articles of guys using late 80s tbi 350s to make fairly high horse power budget builds. If you can find a good set of late 90s vortec heads on the cheap and port and polish them yourself with a good intake and carb you can build a pretty mean engine for cheaper then a crate egine. Just my opinion. Hope to see some pics soon so we can all see what you got to work with.
