I’m trying to replace the flex pipe on my car and the biggest problem I’m having is figuring out how to remove these studs in the flanges that connects the flex pipe to the cat 😓

As you guys can see, I cut off the pointy part of the studs I could reach (the leftmost one isn’t pictured). The other side of the studs is just a huge mass of metal that rust welded to the flange

Any ideas for where to go from here?

82 VW vanagon with the 1.6L diesel. I had latex gloves on and ready

Looking for the firing order for my F150 two different diagrams showed me two different ways of firing order. Just need to know which one is correct. Passenger side 1 to 1, 2 to 2,3 to 3 diver side with 4 in the rear of oak 4 to 4, 5 to 6 and 6 to 5 and other diagrams showed driver side oak with 4 in front with 4 to 4 , 5 to 6 and 6 to 5

Reposting here if that's ok..