in cab tank filler material

[fordman]

i opened up a chevy truck today and this is what i saw. it is a cardboard type of filler for the rear wall. and it had a place for the spekers to mount into. i thought it was pretty neat. and could probably be used in our trucks with or without bucket seats.

[bobsgarage]

We use this alot in the rv industry. we call it bender board. Used most often in the reaer curved wall to ceiling, and on the nose in a CLass C. motorhome over the cab, to make the curved area..

From this post and others, I agree with fordman on this. most trucks have a void in this area, and would allow for plenty of air space. May have to take your tanks out tho.