Yeah have to agree. Even after getting the HQ dash support and ahh pedal hangers? in, there'd be days and weeks twisting under the dash to get it all hooked up, pretty crucial stuff too (brake light switch adjustment, demister pipes etc.. ). Difficult pretty yuck work. I'm sure you'd find on the way that you'd need a full donor HQ for everything under the windscreen to the floor too, not just the dash.

Interested though to know why you're thinking about doing this. If its just because you have an HQ GTS dash, and dont have an HX one, you might be better off doing a trade on dashboards, or even finding an HQ shell might be cheaper in the end.