Gary & Rob, thanks for the info on the plumbing on the underside of the hull for the dozer blade. That was the last piece of the puzzle I needed to complete that part of the build.
Agentg, I had originally considered using solder but could only find very thin solder for electronic work and very thick solder for plumbing, nothing in between. In hindsight however your right, I should have looked harder. The sold copper wire was a little bit of a bear to shape when things got tight. On the plus side though my tank will be environmentally friendly
Disastermaster, nice video links. You can never go wrong with Elvis. May consider a build like that after I retire. By then my rotator cuff will be completely shot and I’ll need the tennis ball cannon to play fetch with the dog. To sell the idea to my wife I’ll put a mower deck on the bottom.
And now the plumbing
I started off raiding the spare parts box looking for things to use for the fittings. I stumbled upon road wheel hubs from an Italeri M109 that I had never complete 20+ years ago. I drilled out the center and shaved off the hat part of the hub.

To make the 90deg elbows coming out the engine comp. plate I used exhaust manifolds from Tamiya M113 engine

Now came the copper for the lines. This shot shows my first mistake with the plumbing, notice the final drive hub is not in mounted and the rubber sprocket splash shield is not on either. This would come back to haunt me later.

The hose shield on the fender behind the reservoir was the most challenging thing to make so far. I started off trying to use the exhaust snorkel and putty to make the shape I wanted. That didn’t work out too well & I ended up carving the part out of a solid piece resin. For now it looks okay but it still needs some work

It was about now, as I was almost done with the plumbing that I realized my mistake with the final drive hub & splash shield. I ended up having to rework two of the three copper lines. (this is where it would have been way easier with solder vs. copper) In the end it came out okay

For the last part of the plumbing I mounted the blade frame and valve box from the Academy kit and connected the lines to the valve box. I then put the retaining straps onto the pipes over where suspension bolts would be

That’s all how she sits now. Thank you all for the help with details, pictures and links!!!
Thanks for stopping in and looking, comments and insight are always welcome
Gary / 1SG