!!slant six 69 DART converted to 360 727 PROBLEMS

Are you meaning the flex plate?

The flex plate bolts to the crankshaft and then to the torque converter.

You also have to make sure that you use the correct flex plate for 360 and the torque converter that you are using. They have converters for 340 and 360 which have different balances. If you don't match them correctly, you will have a vibration.

Take your time and find out what you need now before you end up having to do it all over.