<VV> Re: I need LM body/floorboard repair answers

[Taruffi57 at aol.com]

I am restoring/modifying a '69 500 Coupe and ran across some  "unknowns".
 
(1)  the rocker areas have a rubber "exit" flap on the inside - just  forward 
of the rear wheel, but I see no entry point for water up front.  My  
passenger side seems sealed off at the inside rear of the front wheelwell at the  
level of the rocker..  Good undercoating and no openings for water  entry.  The 
left (drivers) side is quite opposite.  It has gaps in the  lower folded/lapped 
sheet metal at the bottom of the rear of the front wheelwell  and since some 
rust repair has been done recently in that area, the undercoating  is gone.  
Looks like water can easily run down through the rocker.   Did GM completely 
seal off the rockers at the front and should I put it back  like that?
Makes no sense to me that there is an apparent "exit" point at the rear of  
the rockers and no visible "entry" point - forward.
 
(2)  about 2 or 3 inches to the left of the clutch pedal rubber  footpad is 
an area of thick smeared-on sealant.  It's on the sloped  vertical part of the 
floorpan.  There is an exact copy of it on the  passenger side also.  I could 
see rust there so dug out some of the sealant  and found rust-though.  There 
seems to be 3 layers of lapped sheet metal  there...one being the front 
subframe member flange.  No rust anywhere else  in the vertically sloped floorpan.  
Everything behind the gas tank  looks solid and clean.  I don't see any water 
entry point so was wondering  where the water came from to cause this "cancer" 
since I want to prevent  recurrence.
 
Any wisdom greatly appreciated.
 
Joe Dunlap
Cen. Florida
2 Corvairs and a buncha other stuff