If your coolant gets hot enough to melt brass you have more problems than just a heater valve.

Yes a brass valve will work and you could probably figure a way to control it with your "Warmer" knob. Try it and let us know.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.