installing some Blueprint heads wo/ thermactor ports. What is the fix for A/C mount/Power steering stud that uses thermactor hole in head? Seems it's be easy to create a mount from steel using the 2 other unused holes in the Drivers head. There's plenty of space in the alum AC mount for a threaded steel insert. Or drill/tap my new alum head?. I'd rather fab the steel mount, and create copies to sell to others who do not want to drill their heads. A google search on this yields crickets.