Why don't 5001 and 5006 headlights fit in my headlight plugs? I'm pulling my original T3's to save them, but the headlights I bought seen to have slightly wider prongs. Help?

some of the aftermarket bulbs have prongs that are too wide or short. Try a different brand.

I put Sylvania's in and they fit fine.

You have duals, right? Mine is single but the Wagner BriteLite brand
right off the shelf fit nicely.