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9.Now that you have read the theory behind this type of conversion, let's check out how it is applied in the garage. One thing to note is that the S-10 (shown) is not stock; a previous shop cut out the entire firewall during the body-drop process. The completely smooth firewall and 22-inch rims already posed enough problems of their own, but Bobby Martins from Sadistic Iron Werks was able to accommodate the new engine and rims by building a new firewall. None of this is necessary with a general engine swap, and depending on engine placement, the firewall might only need minor modifications. To begin the swap, the old engine was removed, along with the transmission and driveshaft. All wiring and connections are unplugged and labeled. Then, the engine mounts can be unbolted and the engine can be plucked out and sold to a junkyard.