Wll, I ended up doing both! I took the glow plugs out and damn, the comp test guage adapter wont fit into it! However, one of my glow plugs died and I found that out after I jumped all of them one at a time to the battery so this was worth it. Feeling like it was hard to start and ran unevenly for the first few seconds was why I was doing a compression check in the first place!

But through the injector holes I'm getting between 218 PSI to 225 PSI which is fairly even and consistent. I'm just planning to get a good engine and rebuild it and have it ready when this one gets really tired. Right now it runs great!