There are some deleted / extended scenes, but nothing that I think would alter it too much.

If you're trying to emulate the original Clerks, then definitely take into consideration cutting it how Kevin would have in 1994 and budget constraints, like the opening scene with the fire, definitely not in the original film's 27,000 dollar budget. Maybe you can have it start with them working at mooby's and use the drive by of the quick stop to on the drive to mooby's to explain that, or rather let the dialogue do the work for you. Back then Kevin relied HEAVILY on dialogue to move the story and it's the same here but he does provide the visuals most times in this one... so cutting out that kinda stuff would help.

Unfortunately, if doing it in that line of thinking, you might even have to cut out alot of wide exterior shots, the donkey show and such...

Also, if wanting to add something in to make it like Clerks, why not add in the Flying Car short film somewhere in there? maybe on the way to work? idk. maybe it's not even possible (diff model car, clothes, etc)

Just some ideas.