You are right in that heat and humidity takes the edge of anything boosted, even if its diesel! One thing tho is Raptor kits a tuned for high temp operation and therefore are very reliable in our location, all testing is done in Mackay pretty much!
LS1 Pro will do anything that is Holden that needs a Raptor, so V6 is no problem there.
The custom tune for the VY is not yet done but will be contracted to ChipTorque on the Gold Coast/Townsville.
Boosted stroker is still not a runner yet, the customer and mechanic must be waiting on transmission parts from what I can understand, will let you know when its a goer