I bought a used 2010 RT a few months ago at a killer price with 3280 miles. The car is bone stock. I plan to swap in a crate gen.III 426. But I found this place in Martinsville Va. called Arringtons at shophemi.com . they have thier own built crate motors with some really big HP. Anybody done any business with them and/or done a engine swap? If so what kind of problems have you run into?