Would the Dagobah scene where Yoda confirms that Vader is Luke’s father be kept in this altered storyline?
To keep prequel continuity yes. Theoretically this would leave in Luke going to Dagobah and only alter the space battle, jabba subtitles, disguised leah subtitles, jabba palace outside shots and possibly outside shots of the attempted execution, and the space battle. Some minor changes throughout would be needed and scenes rearranged and spliced but that’s the main idea.
This actually might be doable, it would be especially convincing if Jabba’s palace was color-corrected to look more like dark, wet dirt that sand or rocks
I might attempt it. I think the hardest parts would be making the alliance agreement believable, boba-fett’s death, and Han Solo being saved. Everything else seems pretty straightfoward. Not easy by any means but clear-cut.