Originally Posted by MikeR
You could fill it with foam.... but then you wouldnt have any place to put your gas...
that is where the gas tank sits.....
Still, put the gas in THE TANK. Now, if the space that is left in the transverse support box and the tank is foamed it seemed to me it would help sound supression. I don't know...I figured someone may have tried it before me. I did a 1975 Dodge Caravan. But that was for "oil canning" side panels.
If no one has done it, I guess I'll be the first.