G'day hound and welcome to the Forum. I dont have anything on the Lister A but I have been able to use Google to find the manuals I have needed online and free to download. I can't remember if this site has a section of PDF manuals so go to the home page and use the search function to find out.
Is there anything in particular you need to know?

Yes it is a common engine but being a genset it has more value than just an engine alone. If it is going to be removed please don't scrap it and let us know what National Park and State it is in and then could find someone with interest in the complete set up.
If possible what State and district is it in?

Here Ray is under load, well a little bit. This piece of over 100 years old hardwood sure smokes well. The first side had a nail in it and sparks came off that quite well so I turned it over and made smoke. I think I found a small issue but will investigate that later to confirm. I have had Ray on full throttle and he tossed more black smoke out but guess this is because the new rings are not bedded in yet. Happy he is starting off the starter motor/crank handle again. After his long run the heat was evenly spread around the cylinder and head. The radiator top tank was warm to hot and bottom warm only so the thermo syphyon is working. It is also amazing how much air that fan draws though the radiator and this is with out a shroud that was on the original radiator.
Bloody Happy as.
https://youtu.be/OqojstHw3To

Start eating your popcorn.
Well it took a lot to get set up so the belt didn't come off and then it took a while to not just fire but keep running but he did it. This is the very beginning of the mosquito control for our little village, more to come.
https://youtu.be/nkefmulVdJQ

Put the fuel tank and filter on and bled the system then the radiator went on. This radiator had to replace the original honey comb one (in the shed) as it is way past repair. This one came from a Toyota Hilux and with some slight modification and a new mounting bracket I made up plus the steady half way down it works a treat. Note the modified radiator cap because it is a thermo syphon system not pressurised.
After some cranking with my bad shoulders I got some smoke, blue at first now black. It almost want to start up but I run out of power to keep cranking the starter motor as I call it. Just to see if it would get me over the line I tried some start ya bastard and again I ran out of steam.
So tomorrow it is time to belt the bastard up to the David Brown tractor and give it what for.

This morning once I had done all the research on various insurances for one of the cars I made it outside. First is a picture of the copper gasket sealant I have used in the past and it works well. I coated the top of the piston with a smear of grease first then sprayed. After coating both sides of the copper gasket and the head I dropped it in place, boy these are heavy heads. I lubed everything in and around the rockers and push rods and I leave the exhaust facing down when not in use. Nest is a close up of the injector and the roller rockers, very high tech for its age. Finally, setting the gap at 0.008" cold as stated by the manual.

Forgot I did not have a 4.5" ring compressor so I joined 2 hose clamps to do the job. Then had the fun Of getting the bottom end cap for the big end bearing in and on the bolts. Took ages to get one of the split pins through the hole but finally won that race. Fitted front and rear covers, oil tank and fuel pump.

I think there is a torque spec in a manual somewhere but I fitted my big ends up today and it is just as you said, tighten very tight and the split pin fits. I marked my rod, cap and nuts so they all went back the same way. I had to use a pipe on abar to undo the big end nuts so did the same doing them up.