LASt weekend i finally fullfilled my childhood dream and got my hands on a 3dr cosworth, i knew it wasnt the tidiest of 3drs (got it cheap so you can see where this is going!) but today i got a bit of a shock!

Took the kit off to investigate what appeared to be a little bit of rot on the sill and came across this:



This is the sill at the connection point of the inner rear arch,

The rest of the sill looks like this:



All the way along the lip where the sill attaches to the floor pans is completely gone, in some places i have holes up into the car through the floor, the width of the hole is only 2 inches max but its the entire length of Both driver and passenger sills, the lip itself is completely gone and i have a hole in its palce!

Am i looking at an expensive welding job here? (cant do it myself) am guessing all my interior has gotta come out too, is this common on the old 3drs and has anyone had thiers repaired successfully? All advice is welcome as at the moment i'm on an all time low, finding this has p**ed on my chips big time!