Since the factory big block mounts are next to impossible to find, upgrade to a set of these CPP mounts, they are way more attractive than the stock mounts anyway! NOTE: All models will require drilling the 4th lower hole and "may" require trimming the frame rail for fitment. (Part# 6372MP-BM, CP-1114G x 2). Orders placed Friday and through the weekend will be processed Monday (excluding Holidays). If you receive an item that is damaged or defective or missing components, please notify us within 3 days of receipt.