AdderMk2

some key information that you might want to add next time...

Post some pics so we can tell what you are working with.

tinman

You'll probably need to take the header off that side of the engine if the old stick fitting is buggered up and use some vice-grip type tool to get it out.

Then put the header back on and use a short series 5/8" wrench to put the fitting back in the pan.
Been there, done that..........