There is quite a process to install TTL bolts. It is not as simple as just measuring the stretch. It seems you have to torque to a certain amount, then loosen, then torque a little higher. Thats not the exact procedure, but close. The supercoupe guys have lots of good info, but the best is to replace with ARP or use new--every time. They stress head bolts on those Super Chg'd 3.8's. Sure you may get away by reusing, just depends on what you stand to lose if one breaks or they all lose torque settings.
I dont think the bolts actually break or pop the heads off,(even though they could) I think they stretch too much an allow a head gasket to blow.
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