360 Engine Vibration

This may seem silly.........are all the nuts and bolts TIGHT??
LMAO, NOT a silly question but a possible problem. I have fudged this up myself. Very embarrassing when it was found out in front of all the mechanics!
The B&M flexplate made for a 360 is the easiest and least cost solution, assuming the TC is neutral balanced.
THIS! This is my favorite route. The B&M flexplate. A little pricey but it allows for any zero balance converter which is cheaper.