#4306, "RE: flexplate -> clutch bolts" In response to In response to 5
I found if you have the flexplate turned so the bolt is towards the front of the car, and the wrench nearly level with the ground, pointing towards the rear of the car, you can smack it with a mallet really well.
The opposing force of the wrench heading upwards, and the flexplate turning downwards, will keep it from spinning around while you tighten it down.
I used blue loctite on all mine, never chased the threads. Just beat em all until they wouldnt turn anymore. Then went around and re-tried all 4 again just to be sure.