Muddy, which way did you have to open the holes? In towards the center or out?
I wanna say I had to go in with them. There are probably pictures in my build thread.
Even if you elongate the holles, if the flex plate is a dished 4L60E type you still need to address the converter pilot to crank interface
Yep, you might need the same spacer and bolts I did. Also in my build thread.