I was hoping to install the torque converter and flexplate yesterday with the engine in the car. I spent about 3 hours messing with it, until I decided to pull both the tranny and engine again. Turns out the flexplate bolts are hitting the torque converter, due to the reinforcement plate/taller profile heads on the ARP flexplate bolts I'm using. I'm going to try removing the reinforcement plate tonight to see if that will give me enough clearance.

I hope I don't have to go with the original flywheel bolts - I have no idea where they are!