As DD suggests you are best to start out with the factory 1200 loom for lights,dash etc. But from what I've seen you post here you intend running a fairly modified CA so you'll probably think about running an aftermarket ECU (ie. Motec,Haltech,Wolf,Autronic) and these should come with all engine to ECU wiring.

If you want to go full custom wiring for everything you'd need to look at something like a 'Painless wiring kit' or similar, like a lot of the Hot Rodders use.

However if you are thinking of using the standard Nissan ECU (or a modified version) you might want to talk to Kev Rowlley as he has made up looms for hundreds of CA converted Dattos.
His email address was in a recent post....just do a search on his name.