Hector  @  Et Al

I think we are at crossed purposes here.  Unfortunately I deleted the
original message so I cannot send him this directly.

I feel he is referring to the TUNNEL meaning the air diffuser that sits on
the floor and is about 3 inches above floor level.  I am not sure what this
parts official name is.  It attaches to the front heater assembly and is
fastened into place by a number of screws and a metal angle at the rear of
the front seat pedestals.

If this is what he is referring to I suggest that under his tunnel is air
space, that is unless he decides to use some 4 inch set screws to fasten the
fitting he is thinking of.

Ray Hunnam