Dennis, that is some serious work you are doing there! Looking good.
I have seen the same "insulation" hiding out under a Y block valley pan several years back when I dismantled a 292 block from an early 60's F350. Now why did Ford put all of that insulation in there?
Mice and other vermin can make a mess of things. And then when that stuff gets wet, it retains the moisture and things really rot out. Where did you get those door bottoms you welded onto the door?
Daniel JessupLancaster, California
aka "The Hot Rod Reverend"
check out the 1955 Ford Fairlane build at www.hotrodreverend.com