I did one on my old dc5 around 4 years ago on my drive, not too bad if your confident on working on cars. You definitely need to drop the subframe, well I did anyway
I had the car on stands at the front then I used 2 trolley jacks facing towards the car to hold up the subframe while I undid everything and then lowered them down slowly, I then pulled the trolly jacks away from the car with the subframe on them at either side, and then lifted the subframe off and used the jacks to complete the job
The gearbox is quite heavy so I used a jack to lift the gearbox up and then lined it up and pushing it into place from there, it was a pain lifting the gearbox up by hand and trying to wiggle it into place at such a short height, your trying to lift it and bend and look down at the same time
If your thinking of fitting engine mount inserts, aftermarket exhaust manifold etc then take advantage of the subframe being off
As I said, this was 4 odd years ago so I can‘t go into too much detail or a step by step guide but it‘s doable and I did it all on my own well within a day and I fitted a mani at the same time
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