Magnum mount issue?

Well they assure me its not a balance issue. The flywheel is just the plan unweighted one that looked the same as what came off my 340.

Once I get things back together and if it refuses to loose this vibration then I'll take the thing to a local and reputable engine shop and pay them to figure it out and go back to said engine guy with their findings.

This simple engine swap is turning into a long drawn out ordeal.

Out of curiosity what degree fo damage am I causeing by running it if it is out of balance?