I will stand corrected there Gene for the Holden terminology , its the heavy vehicle mechanic coming out in me. If I ordered a cowl for a truck I would have received a radiator fan surround, or a forward facing outer cabin air duct for fresh air supply. If I ordered a scuttle tray 9 times out of 10 I would have got a lower screen panel that ducted any water to the firewall drain tubes. And if I ordered a pellum/Plenum it would have been the complete assembly. Its a bugger that different manufacturers call the same parts by different names. If you ordered a top pellum/plenum cover for a Kenworth they call it a Garnish panel. International trucks call it a scuttle cover panel, go figure.

wbute The gap on the left door to plenum is lower than the guard as you can see in the photo. I tried to adjust the door but then the body lines down the sides were out heaps. The only way of fixing it would be welding a bead along the top of the door skin and build it up. I used a cardboard templet so left and right sides of the plenum were close to being the same. Looking at slightly different angles make the gaps look different. looking from the top straight on the gap look reasonably even except the door to guard alignment at the top edges. The right side come up a bit better due to better door alignment.
The flange I was referring to is the top plenum outer section has a lip/flange where its welded to the body and sticks out under the door inner frame when closed. Maybe when I pull it down to do the inside paint I will do a bit more on it. I just tried to get the outer plenum to match up and get the right shape which wasn't possible without the bonnet, guards and doors on.

Right side.

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