elmariachi There is a note about using GM trans with 26 spline input in FE motors. You have to remove .300" for the trans to bolt up to the bellhousing flush. If not will damage the thrust bearing in the motor. I had mine machined off because of the heat that cutting the input shaft would get. Sometimes you have to tap the clutch because the disc is not centered and binds when installing the trans. Rick L Ps gald you didn't pull the trans flush to the bellhousing with the 4 bolts. Have seen this happen more than once.