360 vibration issue

thanks for the feedback guys. helps me so much. can i get to the crankshaft and bearings and hopefully have a positive result after replacement or am i going to have further problems? i went thru all the steps to get this flexplate right and then later to get the balancer proper. i work at a dodge dealer and can get this done but . i have one more question. when i upgraded the trans mount , all hell broke loose with this vibration and i was unable to ride on the highway comfortably. the old mount was rough but it was shorter and not even close to as stiff as the new one. would u advise me to use the stock mount to see if it will do highway speeds , or is this going to kill my motor more ?