I've seen the startech deal. But I would rather do a custom build around a SB350. I believe that engine would fit in the bay with plenty of room. Plus the power gain would be substantial. You can only make so much power with the stock engine block on both the SRT-6 and the Base model. The only real option is to replace it with something with more power potential. You can easily get 550hp from a 350. That would be plenty of hp for the crossfire. Plus, who doesn't love the sound of a .600 lift cam singing through the exhaust.