putting a V8 in a hilux needs some brainstorming coz the power to wieght ratio n the ability of the differentials and the axles to transfer that power to the wheels also needs to be cared for, u also need to look for the overheating problems in the swapped engine if u are going for a Crawler Rig
Mating a gear box is also an important matter as its the main part in a rig, just a V8 engine wont do the job
about V8 in a Vigo i dont think so its a good idea, the 2nd n 3rd generation hilux are famous project rigs