my mk1 find the leak

my mk1 is leaking from the passenger side when it rains up  behind the dash where could this be coming from its not got a sunroof and all door seals etc are new and in good condition . one hing is the front wings stick out at the back and the doors are out to accomodate this could it be leaking from a pillars that the door bolts onto?

have you looked at windscrean lip were rubber sits in prob got hole under windscrean rubber which then runns in to car

easy fix   

  no 1 leave in garage when rains
 no 2 go to your diy store get about 20 tubes of silcon and plaster every thing
 no 3 leave a lone by some sponges put on floor easy get rid water :google:

drain bungs in the bulkhead fill with crap and then it fills and leaks into the car.
Had that problem with mine, simply cleaned em out and that was that