Sport Coupe Resurrection - Debris in Bores

[TheDude]

Hey guys, I know there are a ton of first start threads so I'm not trying to start another one, but I had a question that I couldn't easily find in any of the other threads.

I recently pulled my great-grandfather's '29 Sport Coupe out of a barn with hopes of getting it running (not looking to restore), just get it running and enjoy it.

I'm working on going through all the helpful checklists on the forum, and the next step is dropping the oil pan. The engine easily turns by hand, but all valve lifters for cylinders 3 & 4 are stuck (I've got the valve cover off so I can see them not working). In working through this, I've noticed a good amount of debris in the bores and around the valves. Is it necessary to pull the head and clean this debris out? I'd really prefer to not pull the head unless absolutely necessary so I was wondering if anyone had a good way to vacuum it or will the exhaust suck it all out once the engine starts.

Any advice is appreciated,
Adam