[Speargun]

When should a torque plate be used when boring a Pontiac engine?

I was talking with my machinist about an upcoming engine build and we got on to the topic of torque plates and when one is needed. Since I'm his only Pontiac customer, I would have to buy one for him and he will do the first couple of bore jobs in trade.

I know that it would most likely be better to use one on every build, but at what performance level does it become necessary?