Well I blew a plug out today. The bent electrode I'm Assuming is from when I limped it back to work and the plug probably was rattling around. Hopefully the head is okay. If not, I have the rethread kit for these mod motors. Either way, it sucks.
Sometimes you can rent a timesert kit from someone for much less. It would be worth making a forum post on multiple mustang forums. Usually pay shipping to and from and well as a deposit/rental fee that some of it is returned once the kit is back in owners hands. Its all private though so some risk is involved.
Awesome. Right now I have a steel helicoil in it, and it's holding so far. I just check the plug torque weekly. But this winter when it's in storage, I am going to pull the heads, and then if still possible, I would like to rent the kit from you