I'm into a similar situation with my GLHT. Did you find it necessary to remove the complete dash assy to do the job? It doesn't look as though it would provide that much additional access. How difficult a job is it to remove and reinstall?
Thanks. How long did it take to remove the dash?Removing the dash is the only way to remove the insulation on the firewall (The rubber covered stuff). For my project there were spots that needed repair under this insulation.
From what you have described, you would be able to fix your passenger side hole once the dash and HVAC box are removed.
As for how hard the dash is to remove, it's not easy, but if you take your time and mark things as you go it shouldn't be too bad of a job. There's a lot of wires, more than I expected. Once it's all out, it's a good time to add some better insulation to the firewall and maybe replace the heater core and AC evaporator.
Thanks........I already have some access issues to the front of the frame rail as the engine is already in the car and fully hooked-up and running. The right rail end should not be a problem to seal up, but the drivers side is another thing altogether...........I'm still undecided as to how I'll approach this repair...When you cut out the floor you will see that that channel ends under the floor and the top of the rail is flat right under the floor. Crap making it's way down there and staying wet is what caused these to rot. Sealing the firewall will keep out the debris and water. Some water could accumulate at the sealer, but with nothing to absorb it, and no where for it to go, it will evaporate before it can penatrate the paint and get to the steel.
I have the engine bay painted and I'll be posting pics soon. I'll make a point to get some pics of the sealer.