Hi Tom,
Well I've done one, but I would say it's quite a bit more than a list of parts to buy, more a list of things to do, sort out.
I'm sure there must be a lot of stuff online that covers it.
Engine mounts made my own. I sat a dummy engine and gearbox in place and once where I wanted it worked out the dimensions for them and made them up. I believe it is possible to buy something, but might not get engine exactly where you want it..
Sump: I chopped the bottom off RB sump and made and new one with sump at rear. You can use a patrol RB sump and do it with less work.
Gearbox: RB. Need to remove the speed sensor to fit it in the tunnel.
Tailshaft: I used skyline shaft. Shortened to one piece. Replaced diff flange with Subaru STI 6 speed diff flange (Not easy to get locally). This flange has the same bolt pattern as Skyline shaft. So it then just bolts up.
Radiator: Both fittings on drivers side.
Plenum: Used Skyline front throttle body, but had to chop front of and realign it for induction pipe to go out the front.
Intercooler: Modified it so pipes go through the air vent holes.
Gearbox mount: Mount be able to buy one, but some have said what you can buy is not great. So might be better making your own up.
Wiring: Either get a Skyline loom and wire it in. Or better way custom ecu and do your own loom.
Time: A lot of it required.
Cost: Quite a cost even if doing all the work and fabrication your self. If you have to pay someone to do it and cost is a possible constraint, then probably not something to consider doing. Stick with good L series.
How's that for a start.
Greg