So the transmission is all back in. This time, it went in very smooth once I got the transmission bolted on. The difficult part is getting it onto the jack.
I saw a video of just using wooden blocks. Somehow on my first go, I actually did this, using many small wooden blocks stacked near each other to raise the trans. However it's a poor way of doing it. Had to figure out a better solution.
I realised that I had little to no spread of force and tension across the bottom of the transmission with small blocks and my jack. So I made a wooden bracket at the back and front of the transmission using some M10 bolts from wood I had lying around the garage. It worked really well. One thing to note is you need to make the bracket at the back long enough that when you stick the transmission jack under, the supports aren't blocking the path of the jack to go under the trans pan.
The photos may explain this a bit better.
https://imgur.com/dGBzcyY
To get the height I needed, I used some big pieces of thick wood. Originally they were going to be used as car raising blocks but they've come handy for many things. You can see the support at output shaft end. Just used two existing holes to bolt it up. Used the lower mounting holes on the bellhousing for the front piece as well.
You get the idea. My original piece was too narrow and I made it longer by 15cm on each side.
Front of car looking back
https://imgur.com/undefined
THEN JUST A MATTER OF GETTING IT HIGH ENOUGH AND THEN PUTTING A WOODEN BLOCK UNDER THE PAN TO JACK IT UP.
ONCE THE TRANS IS SUPPORTED BY THE JACK, MOVE THE BLOCKS AWAY. You may need to have one hand around the trans to balance it a little occassionally but it should be good if you have at least most of the support covering the back 2/3 of the transmission.
This time I used some threaded rod as a guide for the two M10 holes on each side of the bell housing to help line the transmission out. Once I had all the bolts in, I puts the transmission in and it slotted straight away.
TIP WITH THE TORQUE CONVERTER: As posted in this thread before by Puff, make sure the nose of the torque converter sits inside the bellhousing. I pushed the converter on and it clicked on what I thought was 3 times but it was twice as the nose was still outside. If this happens, continue spinning the transmission clockwise whilst putting some pressure as you push (doesn't have to be excessive). Eventually after 6 or 7 rotations it will just slot in again and move further back and be seated. You'll definitely know when this happens and the nose of the converter will be inside the bell housing