The weird thing is it has always vibrated. I need to take it apart, but either way I have decided that the mark's adapter needs to go. That adapter just has a ton of stuff going on in it that has possibilities for funkyness.
I want to stick with a manual tranny.... I know it is not ideal for wheeling, but I like it. Maybe I can sell the Marks kit, rebuild the h55f, get a regular bellhousing, and use some of the money to offset the purchase of a toy box..