Basically, A Nasty cammed straight piped LS7 sound mod. There are alot of mods that use the 7.0L v8 from the moonhawk for other vehicles, Hopper, D and H series, And roamer, Along with a couple of the Small cars, A LS sound file for the 7.0L would be awesome. There are tons of videos out there of cammed Ls7's, WOT pulls, Dyno runs, Drag races, And ride alongs. Then a Turbo Ls7 and a LS9 (Ls7 with a supercharger on it from factory) sound could be made for Different forced induction setups for the 7L. -Ls7 -Ls7 twin turbo -Ls9
I dont really thing a Ls engine sound if fitting for a Underpowered 70's engine. I would say more like the sound of a Dodge Aspen or something like that. More boring, and more period correct.
You aren't very wrong, But with the Supercharge stage 2, It would match pretty wheel. I never run anything less than stage 1. I would have suggested an actual LS engine But figured if some creator wanted it, It would have already been a mod.