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I realize that this is a pretty basic question; but I'm wondering about "unibody's". I am considering purchasing an old Dart (63-66) Most that I have found have the floor pans rusted out. Does this catastropically effect the integrity of the frame/ unibody? (Especially if one is transplanting in a bigger engine)
Is it imperative that you use exact stock floor pans; or can one weld in a heavier gage sheet metal thus replacing the stock floor design with flat metal, and frabricated supports? :confused:
 

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I don't see any reason you couldn't fab up your own floor pans. I would definitely consider putting in some beads (bead roller) for added strength. You could also bend up some braces in a brake and weld those on strategically as well.

I don't have much experience with unibodies but it should work OK.


Wally
 

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Make sure that you check out your torsion bar mounting support. It runs crossways under the front seats. They are prone to rust out in these cars. (All Chryslers of the 60s, for that matter)
 
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