Engine Vibration at highway rpm/speed

okay so its a 72 or 73 block (edit see below)...my memory is fuzzy since 2014 when I checked all that out and started my blog. I did check the casting numbers on the crank...its def cast crank. it has casting lines in it. and I check the numbers on the side of the block...its not a 70 block....it had blue paint on it as well. (edit see below...it is indeed a 70 block and remembered incorrectly, my apologies) there are pictures of it in my blog. I def have the right balancer and flexplate now. it did not before. I have a balancer with the weight bolted to it and the b&m flexplate with the notch in it.

torque converter is brand spanking new neutral balance.