1)What were the different types of steel running boards? I've heard of the Apex type and now the Morton type. Any other types?
The three basic types are the Apex (fabricated rectangular grid), Morton (punched round holes), and Gypsum (punched and stretched into diamond holes). Other companies have made running boards (Blaw-Knox for instance), but I don't recall what they look like. Didn't the Blaw-Knox look like an Apex?
