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When you guys who have replaced floorpans did them, how did you get them to attach to the frame rails? I'm having a hard time getting them to stay flat against them and I don't know of a good way to attatch them.

1967 coupe with vinyl top. 351W engine with C-4. Work in progress.
 

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Used small screws to hold the two panels together then welded them. Once that was finished removed and welded shut the holes

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I use a floor jack. The weight of the jack alone did most of the work. A little pushing against the bottom of the dash did the rest. Use a board to spread the force out along the dash bottom. It was quick and easy and didn't require the extra holes to fill. Just don't push so hard that you bend the dash.
 
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I used self tapping hex head screws, about 3" apart. Put all of the screws in, then went back and took everyother one out a few at a time, and weld up the holes. If your reusing your existig frame rail, make sure you wire wheel it really good and get it clean.

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Screws work well. Another thing I did was use the wooden end of a hammer handle to push against the new floor while I welded up the hole. I would also recommend you start welding the floor from the framerail floor support and work your way out to the edges. If you start at the edges, you might get it to "tight" and it won't bend down to meet the floor support.


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That's the exact problem I'm encountering. I did the driver side first and it was a complete learning experience I hadn't even welded before. Haven't done the passenger side yet, so now I'm a little wiser.

I had a lot of problems cutting out the old floors on the passenger side. I cut higher up on the tunnel than my new pans go. Any suggestions on how to patch this up?

1967 coupe with vinyl top. 351W engine with C-4. Work in progress.
 

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I keep cutting and cutting, and it's still too short! *G*

Sorry to hear that. I think you'll have to put in another piece to fill the gap. Or buy a new pan. Luckily, the tranny hump is a place not many people will see, including those who look under your car.


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