We just finished the 66cowl repair as you asking about.
Lots of pictures of the repair on our web page:
Cowl Repair
The 66 had been parked in a container since 1978 at the construction site. Lucky for us it had not been exposed to the elements for the last 30 years.
We ran a garden hose into the cowl and made sure it drained out the fenders and checked for leaks inside the car but found NO water. We have a rare Mustang that has not rotted out the cowl or tophats.
We decided to use the "Tin Can" Method to check them out by cutting the end caps and bending them up.
The cuts were done with a 4 1/2 angle grinder and a 1/16 inch thick cutting wheel. To finish some cuts, a hacksaw blade was used.
We used Rust Encapsilator on all the metal to stop rust from forming. All of the metal seams and top hats were coated with seam sealer (Eastwood).
After coatings were applied, we MIG welded the cuts back together, ground down the welds. We then applied paint and seam seal on top of the welds. The area is covered by the fenders so it will not be seen.
It took 1 weekend to complete.
If the 66 had needed new top hats installed, we were going to extend the cuts towards the center of the car and follow the procedure from this link:
Boyd's Mustang: Cowl repair
Luckily, we did not have to!!!
check out our website of the progress
[SIZE=3]Christophers 66 Mustang Restoration and Modification[/SIZE]