I was wondering if anyone knew if the D34/78 is the correct Optima Yellow top battery to run on an 03 Mach 1. I saw that American muscle sells the D34/78 to run on all 79-10 mustangs. My motorcraft oem went today and autozone had the D34/78 in stock for $224 so I picked it up. Autozone system didn't recognize that battery to be ran with the mach 1 so I called summit racing and they didn't know either. I then went to optimas website and to check by make and model and there wasn't even and option for the 03 mach. So I am hoping this is the correct battery for my mach if not I want to take it back. I would call optima directly but they are closed on the weekend. Any knowledgable help would be great appreciated.