727 flex plate?

Bobzilla said
If you ordered a flex plate that is offset weighted for a 360 it will be wrong and will cause a vibration, if it truly had no vibration the way it was. The parts in your picture are for neutral balance.

How did you positively identify this as a 360 crankshaft; casting number? You said it was Mopar. If it was a Mopar Performance crankshaft it could have had a 318/340 main size with any stroke, so you’d have to measure stroke to be sure.

Yes, that is correct. I will have to figure out a flex plate / converter combo when it gets here.
I have a 360 motor with a stock mopar cast crank and the rear flange is exactly the same (pic).
I was hoping to avoid opening up this motor since I will be building a stroker motor over the winter from the other 360 block but again, you are correct.....I don't know the exact stroke in there.