Thanks for the quick replies. The plate is almost certainly on backwards, it all makes sense because the mounting holes only allow it to line up one way. I'm sure having the holes offset because the plate is on backwards causes the whole deal to be out of round and therefore vibrate. It's amazing the guy I got it from never changed it around?

I'm not doing anything crazy with the car just want a jump in and go cruiser, I'm most likely going to order the B&M 10230 and some new bolts. With any luck the flex plate was the weak link and it didn't rough up the crank or back of the block. Maybe I can even get to drive this thing before the weather breaks.