Bolt down a tool steel face, drill all the way throw the ASO put in the bolts and drill holes in the tool steel that are the same size as the head of the bolt, thn weld the tool steel to the bolts.
Whele I gess you have to heat treat car springs with oil, I quenched it in water and it shatered. O well, I am going to make anther that looks the same and this time I will quench in oil.
I had one of those HB anvils and all I have to say is piece of junk. I was forging a RR spike and it made almost as much of a dent in the anvil as in the spike. They are advetised as glueing waights in there cataloge and that is all they are good for.