HELP: 1967 Mustang Coupe Floor Welding Question - Vintage Mustang Forums
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post #1 of 10 (permalink) Old 05-16-2019, 07:54 AM Thread Starter
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HELP: 1967 Mustang Coupe Floor Welding Question

Hey guys sorry if this is a dumb question but im 17 and just recently traded my nova for a 1967 mustang coupe and am starting to fix her up and get her ready to daily drive, i have to do some weather stripping and stop some leaks that happen from rain water but i need to replace all 4 floor pans, i have the replacement pans already and i have a buddy to weld them in but i am curious about one thing, Mustangs are unibody cars like my nova so i know the subframe has to connect to the floor pans, but how ? Do they weld on or bolt on and when i cut out the floor pans how do i do so without cutting the subframe or damaging it, how do i disconnect it from the floors so i can pull them out after i cut it and put the new ones in? Do i have to weld the subframe to the new floor pans? Thank you in advance for your help! Oh and also the subframe isnt bent down or anything from the car, the frame rails all seem straight just the floors are bad from the leaks in the weatherstrip and the cowl vent (which is common with mustangs as yall know and im about to fix that too)
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post #2 of 10 (permalink) Old 05-16-2019, 08:26 AM
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The floor pans are spot welded to the frame. You just have to find all the spots & drill them out. Body shop suppliers have the tool to do that. Then drill new holes in the new floor pans & weld them back in !
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post #3 of 10 (permalink) Old 05-16-2019, 08:46 AM
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Welcome to the board.

We have a Build Section for projects. Start a thread, Iíd like to follow the work.
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post #4 of 10 (permalink) Old 05-16-2019, 09:31 AM
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Here's a start...

http://www.mustangandfords.com/how-t...lace-floorpans

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post #5 of 10 (permalink) Old 05-16-2019, 09:32 AM
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They weld to the rockers and then get welded to the floor supports.


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post #6 of 10 (permalink) Old 05-16-2019, 09:38 AM
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In the second picture you can see where I ground down the welds that attach to the floor supports.

https://forums.vintage-mustang.com/b...ml#post9995890

If you look at some of the other build pages, you can find some better detailed pictures of some better detailed work than my own.

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post #7 of 10 (permalink) Old 05-16-2019, 09:42 AM
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Originally Posted by njp914 View Post
Hey guys sorry if this is a dumb question but im 17 and just recently traded my nova for a 1967 mustang coupe and am starting to fix her up and get her ready to daily drive, i have to do some weather stripping and stop some leaks that happen from rain water but i need to replace all 4 floor pans, i have the replacement pans already and i have a buddy to weld them in but i am curious about one thing, Mustangs are unibody cars like my nova so i know the subframe has to connect to the floor pans, but how ? Do they weld on or bolt on and when i cut out the floor pans how do i do so without cutting the subframe or damaging it, how do i disconnect it from the floors so i can pull them out after i cut it and put the new ones in? Do i have to weld the subframe to the new floor pans? Thank you in advance for your help! Oh and also the subframe isnt bent down or anything from the car, the frame rails all seem straight just the floors are bad from the leaks in the weatherstrip and the cowl vent (which is common with mustangs as yall know and im about to fix that too)

This board is Great!!

Ex-wife,....."You drove how far for that thing?"
Daughter,..."Theres no inside and it stinks."
Friend,......."Dude, thatís a rusted pile."
Son,.........."This old car is cool."

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Build Thread: http://forums.vintage-mustang.com/vi...sted-pile.html
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post #8 of 10 (permalink) Old 05-16-2019, 10:05 AM
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First off welcome to the forum. Second spend some time looking through the Build Forum here on this site. You'll get plenty of tips there, I promise. Also do a search of Youtube for Jo Daddy. He's a down to earth and knowledgeable Mustang sheet metal repair guy. He has done several early Mustangs. Also check out another young California guy on Youtube. He's done a series of videos called Four Speed Films. Check out his Mustang, I think you'll like it. Lastly you should update your forum profile to show your location. You never know, another member may be closer than you think. Good luck with your car.
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post #9 of 10 (permalink) Old 05-16-2019, 10:13 AM
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These are the two floor supports the floor gets welded to. Thereís also the trans tunnel hump bracket (not pictured ) that also get welded to.


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post #10 of 10 (permalink) Old 05-16-2019, 01:02 PM Thread Starter
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Thank you all so much for your replies and help, I’ll look into all the information you guys sent and will try to document the stang with pics!
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