The "Lost Cut" has been described in the past. One of the guys who did the Marvel comic adaptation was invited to see the rough cut screening. He related this experience in an old Starlog magazine interview. IIRC, the original-original crawl was in place. Dave Prowse speaking Vader's lines. (Darth Farmer!) All of Biggs and Jabba. The most surreal part being Han and Luke defending the Falcon from attacking WWII fighter planes.
