[Ozzie Goat]

I really appreciate you checking in to assist.
This has been very challenging, and my car - I now think - has always run on seven cylinders.

The heads are described as Ford Racing X #M-6049-X306
I took a look and don't see the plug reach documented. I'll keep looking.

Question: what if I didn't use a boot at all, using just a 90* connector?
What is not there, can not melt and redirect the current.

As of this morning the ceramic boot has not shorted, but since it touches the header I'm adding a heat sleeve to ensure a gap.

Roy