[Fot] TR4 Spark Plugs

[Scott Janzen]

I am prepping the recently acquired TR4 for the Turkey Bowl at Summit Point (Thanksgiving weekend) and thought I would get some new plugs.  The current plugs are NGK BP8HS-10.  These come up in google searches as being used for marine applications, though there's nothing in the part number that indicates that use.
Engine is about 170 psi compression, 12:1, guessing from the cam that the engine will be running between 4,000 and 7,000 RPM.  Plugs are running light-medium brown, so apparently about the right heat range.
Recommendations for plugs, or should I stick with what I've got?

Here's the current spec:
non-resistor plug
Thread Size: 14mm
Thread Reach: 12.7mm (1/2")
Hex Size: 13/16"
Heat Range: 8
Gap: 1.02mm (.040")