Damn! I completly forgot about this!!
Ok first up the 20vlave will bolt as in the engine mounts will fit, but the distrubter in on the back of the head, rather than on the side, this means it interfers with the firewall. Then only solution is to cut a hole in the firewall that the dizzy can fit into.
Personaly I would stay away from the 20V, not many people know alot about them, and if you want to tune it, it could be diffcult.
Go with a 4agze from a Trueno/sprinter, It will again drop straight in, and there are no worries with clearance.
You'll need to find a T50 g/box and a bellhousing to make it all fit, but they are out there. Run a frount mounted intercooler and use the factory ECU, so make sure you get one that hasn't had the wiring loom cut up.
Changing the diff to a shortened Hilux one is also a VERY good idea, the stock one will not last long, and most of the Hilux diffs are LSD.
It's also a lot easier to start with an injected car, other wise you need to run fuel lines and new fuel pump etc.
And don't forget suitable suspension and brake upgrades.
Ill come back and ad more as I think about it.