I did the firewall inside with stick-on insulation but not the outside. Over an hour or so the whole cab heats up conducted from the firewall which picks up engine heat particularly from the exhaust. In the winter this is s help as I don't have to run the heater after a while. But in the summer.....

So, I wish I'd done the outside of the firewall. I might yet but I wonder if I could get the pieces slid down behind the manifold and head before they stick too soon and make a mess.


1951 3800 1-ton
"Earning its keep from the get-go"
In the DITY Gallery
1962 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.