I will tell you what. I have had this car for 11 years, had one decent summer driving it. Always wanted to take care of it and make it nicer... make it the car I wanted it to be. Ive been trying to do that. I rebuilt the motor, new interior new body panels, paint, you name it, ive done most of it to this car. This motor maybe has an hour of run time on it. I just got the EFI all buttoned up and fired it up for the first time tonight... it fires and runs, but it has a terrible noise coming from the back of the engine. I think it has a busted flex plate. I can not see the torque converter bolts hitting anything. When you turn the motor over with the starter it doesnt make any bad noises... but when the motor fires and takes off it makes a helacious screech and knocking sound .. i am on my last string of hope. what do you think it could be?