The tunnel sides are riveted to the floor panels. We did this with the structure on its side. Easy riveting for a change.
The tunnel sides need to be riveted to muffler sides.
The Routing Channel is fixed between the tunnel sides.
You can see where I have used blind rivets in the last holes of attaching the Muffler Tunnel Ramp to the sides. I could not get any form of bucking bar in the very narrow gap.
Finally, the Fuel Selector Valve Bracket is attached. Easy to do this with the squeezer but you have to be cognisant of the orientation of the bracket as it isn’t symmetrical.