I have several friends who have Cobra's, Marauders and MARK VIII's.
everyone of them complains about the coolant crossover plug.

Being a machinist i made some of these.

I can drill and tap the center for a coolant sensor too.....
I put an ad in the classifieds.

If anyone else has any issues and ideas about how to make something to solve the issue let me know...... My CNC machines sit idle more than they run.

 

I'll be doing 2 plugs with the 1/8 npt threads through the center in the next couple of days, I'll also have 6 more done at the same time. I'll post pics of my finished parts when they are all done.