I went through about the same thing trying to find the right alternator for my 68 GTX. NAPA, Advance, or O'Reilly don't even list one for a hemi, but they do for a 440. I ordered one from O'Reilly and it's the correct roundback style but still came with 2 field terminals. Think I'll just ground the extra field and use it. I thought about buying all the parts and building one but this one is "pretty" and only cost about $50.