In this review http://www.4x4review.com/products/drive_train/ordaxles.asp it is said (by offroad disign's stephen) that the 10bolt front is as strong as a dana44, and not far behind a 12bolt. This brings me 2 questions. 1. Why ever install a dana44. 2. Does a 12bolt front exist? "K5 Grand GT Blazer Silverado in the Netherlands."