v6 engine

So recently I’ve been getting a noise every time I open up the throttle. It sounds like a large hissing sounds and I can’t figure out what it is. Before the noise happened, I ran a bit low on coolant and on that day my thermostat just didn’t open so it pegged the temp. I replaced the hoses...

Weird idea but I want to be different with my ride, I want to swap in a different v6 but I don't really have any ideas what I can do, I was thinking maybe a 3.6 from a camaro (300HP v6 sounds perfect for an s10) Anybody have any suggestions? Don't want to build a 4.3 because it's a money pit of...