Bushings have been fabricated and installed, and the plenum is ready to be reinstalled in the truck. They used a bar of leftover aluminum-bronze alloy to fabricate a bushing set for the rear (sealed) end of the shaft and one for the center of the shaft, between the runners for #3 and #4 cylinders. The stock seals between the other cylinders looked good and feel tight, so those were left alone. The bushing at the front side, where the actuator is was surprisingly good, but we did add an o-ring of the appropriate size to help seal it.

Loc-tite was used on the screws to help hold the butterfly valves in place with the machine screws.

I have the plans that were made for the bushings the guys cut with a wire-water-jet machine. They were measured down to ten-thousands of an inch, so they are fairly precise. There's no binding on the shaft, and it is much tighter than it was, of course.

Provided it works, and I don't see why it wouldn't, I can have more bushings made. If there's any interest, and if I can put another one together, I may offer an exchange program for rebuilding some of these.

There aren't any pictures, but when it's all said and done, it really isn't complicated at all. The tough part so far was to have the bushings made, and to use a suitable material. Disassembly/reassembly is very straightforward.

I'll update this as things go on the truck and I have a chance to run it in.

John B.