Nice truck Tim! Brings back memories.
Unfortunately those instructions for the body won't help much for the LS as they are different bodies. Yours is the original Blue Eagle with shorter rear arms and Blackfoot-style wheel adaptors. That one has a pick-up body and the LS version has a stadium truck body (same as the Nitro Hawk). Thanks for the trip down memory lane though. That truck was the first competition-level truck I ever owned. It was really ahead of it's time. I got mine new and the RC10T wasn't released yet. The JRX-T was it's closest competition that I recall, along with the RC10 monster truck conversions. To me, the Blue Eagle was just on a whole other level.
Here's my shelfer that I built from several ebay auctions I also have a NIP Traxxas body and decal sheet for it::
Oh, the gear cover you need for your truck is the clear lexan cover. It's the same as the white one, just older:
