Alright, big progress time: (sorry about the wait, I kept thinking about it when I didn't have time, then as soon as I've got time I'm distracted as usual by everything else

)
Firstly, I got the radio from the ute in and wired up, pretty chuffed with myself as I've never really done any wiring before, I'm just lucky the previous owner of the wagon labelled the red, yellow etc. wires for the radio. Found an image of a wiring diagram for the JVC unit from the ute and just used some squeezy connections to wire it up, I might do it better in the future if any of them fail:
Also as you can see from the pic I put the standard MQ wheel from the ute into the MK. I much prefer the original look as opposed to the wooden wheel that was in here. I would like to get an MK wheel for it at some point, but for now I actually think the MQ wheel looks more 'classic' than the MK ones. The other reason for swapping the wheels was to sell the wooden one, much more useful to me liquidated than sitting in the shed.
As for speakers, dad gave me his old GU speakers, which I'm pretty happy about as the quality seems pretty good on them, and I just had to use some plastic speaker spacers from repco to make them clear the windows in the GQ doors. Other than that, I had to drill new holes for them since the GQ has smaller speakers with different bolt patterns, but now I can use any speakers made to fit a GU.
Next, I got the conversion official, with an LA1, LA2 modplate for the fitment of the engine and gearbox, and removed the old plate for the cleveland conversion. Exciting day this was, felt like we were really getting somewhere, and I was very happy. (plate on the right)
Next, we fixed the oil leaks. This is probably the most embarrassing part.
When I got the turbo motor, I had to swap the starter, alternator etc. over from the N/A, and in the process of doing so, swap over some oil lines for the vaccum pump too. Now, during this, my toolbox was out in the backyard with the ute, and me, being lazy, decided that I couldn't be bothered going out to get it, and tightened them all finger-tight with the intention of tightening them properly later. I then promptly forgot about it and assumed everything was fine.
Dad got underneath the other day to see if anything was loose, causing the oil leakage, and found both oil lines to and from the alternator/vac pump only finger-tight. Ahh, whoops.
So he did everything up and we found it leaked less oil, but still a bit. I then had a look and found that the rubber 90-degree bend from the turbo oil return to the block had a split in it and was dripping some of the oil that was supposed to be returning from the turbo onto the ground. Anyway, I went shopping for a new bit and didn't find anything to fit, but Bursons had a bit of fuel/oil pipe that had a similar bend in one part of it, I'd just have to cut it out, but the diameter was too small. I decided to test it out anyway and with some oil and heat finally got it on.
Short version: rubber oil hose had split, got new piece to cut out and stretch over, no more oil leaks!
Next, attached the bullbar from the ute since it sits better against the front of the car, doesn't stick out as much as the ARB one, and it also is taller so doesn't look as weird with the body lift. So it sits more flush with the grille and doesn't look as short:
Next, got the exhaust sorted. we've had to use the N/A one from the ute for now with the big muffler on it as the V8 one wouldn't have matched up to the dump pipe from the ute, but I'll get a better one at some point. For now I'll just have to live with it being all quiet and sad

. Almost sounds like a new car
sigh.
The previous owner of the N/A ute did a dodgy-as straight pipe on it, where they cut out a section of exhaust before the muffler, but left the muffler itself attached so it looked somewhat legal, so I went down to the local exhaust shop here in Caloundra and got them to make up a bit of 2 1/4 pipe with flanges at each end to clamp on, so that it's a complete exhaust again now. Sorry about the quality of the second one, I don't have a photo of it so I took a screenshot of a video...
Next, my newly modified TD42 starter decided to be not-a-starter anymore, and I got the dreaded "death click". At first I thought it might be my too-small battery, but I got a new big one, no difference. So it had to be the starter. I contemplated rebuilding mine but decided to just get a brand new one from OnlineAuto Parts in Virginia, Brisbane. I was down there anyway so decided I may as well. Now it turns over much quicker and quieter

. (See my starter thread for an explanation on that)
And then I had the roadworthy guy come over again, he asked if I had fixed all the things we talked about last time, I said yes, he had a look around to make sure and did the roady there and then. So I was very happy again.
Then that afternoon (Friday) dad told me to go and get it registered so we could drive it around for a few weeks to make sure it's reliable and working properly before the big Fraser trip. So most of the work is done now. Still need to attach the exhaust properly, it's only using one of it's 3 factory mounting points as well as the dump pipe to support it at the moment, but I drove it all over town yesterday and got it up to 100 twice and it seems fine temporarily until we get that sorted.
The other issue at the moment is that there's an old boost tee adapter in the intake manifold with no boost tee atached to it, so it's leaking some boost out of that, which also has the side-effect of not giving enough fuel from the boost compensator. The end effect of this is that it's got absolutely no top-end power at the moment, but that should be sorted with my JRP gauges fairly soon.
But yeah. I'm pretty stoked that after all the hard work it's actually on the road, if anyone's around the Caloundra area and you see me around give me a wave 👋