6v to 12v step up converter

Nothing on AMS.

Talked to the rad shop about 30 minutes ago. One of his core suppliers is willing to try a rebuild- estimated $360, plus cost of failed cores, plus shipping, plus taxes…. I will freeze before I have a $500 heater as seldom as I will use it. I am cheap. If I cannot figure out a solution, I will order the new heater and step up.

Any comments on 4 amp power to 8 amp motor?

On the bright side, if the 12v solution doesn’t work for me,I will save it for the 51 Dodge farm truck I am starting to rebuild - it wii have 12v neg ground electronics.