Yeah that info is not true, Tim, the main guy at BKP, will do any cover you like, even custom orders if you ask, he's totally amazing like that.
Having said that, War Pig in mahogany will be sludge-tastic. My mule in my flying v will cover classic rock to metal amazingly, and it's mahogany and similar amount of wood. If you're certain you want hotter, the Crawler is the choice for you. Classic growl all the way to thrash if you want it. It's a hot mama that one!