3 drill holes through the new floor pan every 1 around the perimeter.
Estimate to weld in new floor pans.
A continuous weld is unnecessary and more likely to crack later on.
Trace around the framerails with a marker and remove the floor.
Your car s original floor pans were spot welded in because it was the most cost effective cheapest way to do thousands of vehicles.
2 shape it to the original floor pan.
You may need to adjust the seat pan tabs on the sides of the floor.
Butt weld vs spot weld.
Rather than duplicate the factory spot welds many restorers prefer to run a complete bead around the new panel.
I have seen this part of the job skipped and the new pans installed right over the leftover scrap.
The common repair method is to trim the old and new create a stepped flange around the perimeter of the replacement panel and install it with a lap weld because butt welding is difficult.
We go back over the lip with a grinder to make for a nice flat surface to set the new pans on.
1 cut the sheet metal to size.
Start to finish it s roughly an 8 hour job and can be easily broken up over a two day weekend with a mig welder and a plasma cutter.
Right now i am thinking that i will first of all.
Slide the new floor under the car and lift it into place.
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Removing it makes for a much neater job.
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White s advice is to replace a rusty floor pan as soon as possible to avoid additional problems.
I am currently in the middle of cutting out rust from a car floor pan and will need to know soon whether i can do spot welds or do i have to run a bead.
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