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Old 04-26-2006, 09:17 PM
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Floor pans/under coat

I have a 70 camaro that needs RS & LS full length floor pans,and the under side needs undercoated,I was wondering which would be the best way to go about this.I have only installed patch panels on floor pans,and I was wondering should I use sheet metal un-bent,or buy the complete floor pans.Which type paint should I use on the bottom I want it to look good,but it doesn't have to be a show car.Is there any way to hide the weld?I am also working outside on the ground.Any info would help.

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Old 04-26-2006, 09:55 PM
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70 camaro is a classic, it would be a shame not to use repro floor pans IMO.

Vince
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Old 04-27-2006, 08:18 PM
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Originally Posted by 302/Z28
70 camaro is a classic, it would be a shame not to use repro floor pans IMO.

Vince
Yea thats probably right.Would it be a good idea to do before or after the drive line is installed?The subframe is back under the car I had it powder coated,which is the best way to install these aftermarket pans?
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Old 04-28-2006, 09:51 AM
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It's always easiest to install floor pans with at least the transmission and driveshaft, as well as exhaust, out of the car. Install THEN paint/undercoat. Paint and underdoating will interfere with the welding. You don't have to weld continuous beads -- make ~1/4" long welds about every 1/2" around the edges. That's more than the spot welds that originally held the pans in.

The subframe shouldn't interfere with cutting the old pans out and installing the new ones -- depends on how close to the subframes you need to cut. If closer than 2-3" you probably want to remove the nice subframe -- or risk nicking it. I'd use a sawsall or air body saw to remove the pans rather than a torch. If you can see all the old spot welds it's best to just use a spot weld cutter or drill to remove the pans like the factory put them in. Replacement pans usually have a little extra metal on the edges that can be trimmed when fitting.

One more thing -- before you remove the pans make sure the car is well supported and level. The pans add a lot of rigidity to the car. It is possible to put the pans in with a slight, but unnoticeable, twist in the car body. If you do, that slight twist will always be there and show up when you install doors, fenders, etc. It will be hard to get parts aligned properly.
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Old 04-28-2006, 06:19 PM
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Originally Posted by farna
It's always easiest to install floor pans with at least the transmission and driveshaft, as well as exhaust, out of the car. Install THEN paint/undercoat. Paint and underdoating will interfere with the welding. You don't have to weld continuous beads -- make ~1/4" long welds about every 1/2" around the edges. That's more than the spot welds that originally held the pans in.

The subframe shouldn't interfere with cutting the old pans out and installing the new ones -- depends on how close to the subframes you need to cut. If closer than 2-3" you probably want to remove the nice subframe -- or risk nicking it. I'd use a sawsall or air body saw to remove the pans rather than a torch. If you can see all the old spot welds it's best to just use a spot weld cutter or drill to remove the pans like the factory put them in. Replacement pans usually have a little extra metal on the edges that can be trimmed when fitting.

One more thing -- before you remove the pans make sure the car is well supported and level. The pans add a lot of rigidity to the car. It is possible to put the pans in with a slight, but unnoticeable, twist in the car body. If you do, that slight twist will always be there and show up when you install doors, fenders, etc. It will be hard to get parts aligned properly.
Thanks the only thing is I have all the panels back on the car will it affect them?
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