There is on YouTube a transfer of the Raiders of the Lost Ark reel. I know it is YouTube quality but if you're just curious how the cut to a 400' reel was handled it is there for the seeing. Some guy has about 40-50 old Ken Films, etc. copied and posted. The quality leaves a lot to be desired but having owned a lot of these in the 70's and early 80's it was a nice stroll down memory lane watching these. Funny, I don't remember my versions of Star Wars being cropped as severely as the ones that are posted are.

Look for the YouTube poster GhostHost1969, just checked his set and Jaws is there - lists it as the long version and the time tracker on the video says 30:48.