Wiring Diagram needed Chevy 4.3 V6

[FJ40-GARAGE]

A Friend of mine wants to put a Chevy 4.3 V6 Engine in his TOYOTA Truck.
He´s searching for a wiring diagram that shows the EFI System and related wiring.
Ident.Nr. 1GNEL19W3SB162214

Is there a source on the web?
Maybe someone got one ?
He wants to start saturday with doing the wiring ......