I rebuilt a C4 for a guy one time. He called and said it didn't work; wouldn't even move. He said he revved it and nothing. Had a new torque converter he bought off a buddy... So he brings the trans back along with the converter. I said where's the converter? He picks it up out of his trunk with one hand; like an 8" donut...5k stall...His old worn out 302 two barrel couldn't even rev high enough to hit stall.