Yes, the tappet cover came out really well. If I ever have the engine out, I'd like to do the whole thing.
Not sure where I would get an oven big enough to bake it though.

I gave it a short run after fitting it and it sounds much better now. I'm guessing a lot of the noise was from the excessive valve clearances.
It still has a hesitation when accelerating though. I have to check the timing and it would probably pay to give the carby a good clean and maybe a rebuild kit.
I noticed a red stain down the sides from the dye in the fuel, but it may be from a long time back.
The way I look at it though is that if I rebuild it now while its here in the paddock, I'm less likely to have it fail out in the bush miles from spare parts.
Also, if it does break down later, at least I know how it all goes together. The frustrating part is that every time I fix one part, I discover another part that needs work.

Oh well, it all has to be done sometime.
After I gave it a run, I was moving some tools around when I bumped the highly technical alternative fueling system.
(The black drum with the garden hose stuck in it in the pic below).

It was almost empty. I'd moved it around while working on the tappets recently and it was over half full then.
I followed the hose down and found it was leaking out where it joined the fuel pump. The garden hose was very old, cracked and hard from long sun exposure.
I'd say the fuel had syphoned out slowly. The good thing is that it might kill the damn grass that keeps growing under the truck where I can't get the mower.
I thought about changing priorities and getting one of the fuel tanks refitted, but then I would need to run the new fuel lines as well,
and I would always have the risk of fire while I clean and repaint the rest of the chassis. I found the solution while checking out a big second-hand
shop while I was supposed to be working. I picked up a plastic boat fuel tank. I'll leave the squeeze bulb in the line, but remove the hard plastic hose
and replace it with the proper rubber fuel line. This way, I can disconnect the line from the tank if I need to refill it or when I need to grind or weld in the cab.
The day before I found the tank, I went to buy some petrol so I could run the truck more. Now that the oil cooler is back on, every time I run it,
it pushes more oil into it and the level on the dipstick drops way down. I top it up, run it a bit and check then repeat.
My regular jerry can was full of diesel, so I grabbed one of the ex-army ones I had here that I was going to clean up and repaint.
I filled it up about 3/4 as I was worried the seal in the lid was dried out and cracked and I didn't want it to leak if it sloshed around.
When I got home, I used a funnel with a strainer, luckily, as I couldn't find the pouring spout I had. As soon as I started pouring,
I realised that the lining of the jerry can had cone off and was coming out with the fuel in big chunks. It looks like layers of old red lead paint.
I'm not sure what they used to coat the insides with, but now I need to work out how to clean and recoat this one. Steam cleaning might work.
The paint didn't dissolve in the petrol, so I was able to strain it out with the filter in the funnel, then I ran it through again with a piece of paper towel in the bottom.
With the amount of flakes I got out, I think about half the lining came loose.
Other than the lining coming loose, the jerry can is in great shape for it's age. It is very heavy gauge steel and there is no sign of rust or wear. Once its cleaned up, I'll use it on the truck.