It shouldn’t have been possible because of the taller torque converter, but we did it. Dibs at OC tells us that normally when you force the late transmission onto the early engine like we did, you tend to shove the torque converter into the pump and that often destroys the pump or other parts inside the transmission. As it turns out, he ended up pulling it apart, but we’d managed to not kill anything so no rebuild was necessary. OC Trans showed us some upgraded parts in our transmission, as well as some parts that they prefer to use to get built 4L60Es out for less than we have in this one. In the end, we decided to keep what we had because it wasn’t broken. But, if we ever do destroy it, our first stop will be right back here for a rebuild and upgrade.