Should be a fairly tight fit. POP rivet self expands the backside. Put on a washer on both front and rear. Pull the rivet down and you're all set. Should be able to do it in the door. There are many sizes and lengths available. You will need to buy the tool as well. But, once you do, you will find a million uses for it..

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Jeff Lawrence
1987 300e
1989 300e
2000 Dodge Grand Caravan SE