A 1974 Duster - My 2nd one, 41 years later!

Alex5280 said

^ Good idea! Once the carpet is in place, I’ll burn the seat holes in from under the car with a soldering iron. Got passenger side glass in yesterday!

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I do this also, but I made a tool from an old junk screw driver ground to a point. Use a long one and close to the size of the bolts. Get it hot with a propane torch, and push it in, works slick.