Here is our Gen 4  ECM Mounting bracket for two and three connector E67, E38, E78, and E40 ECMs.
These are found in 2006/2007 and newer era ECMs, dominated by the E38. These computers were not phased out until 2016. In the early years of this computer, they did control a few LS2 engines, but they are primarily used for LS3s, LSAs, LS9s, and V8 truck and SUV engines. E38 computers were the most common among naturally aspirated factory engines, but forced induction factory engines (LSA, for example) were equipped with the E67 typically, a cousin to the E38.