Update your car. Bring it into 2019 spec. Three items. One, BMGR starter of the brand you like. Two, a good battery. There are many posts on this sight about the best battery for Pantera. Most Pantera vendors like myself use Odyssey PC925 Extreme Series. three, a modern alternator that puts out enough amps to kick the starter & battery at full capacity. Single wire is an easy installation, available from TuffStuff directly or Powermaster. Select from 100 amp all the way to 150 amp to power EFI & modern A/C w/double condensers [fans]. These item are not expensive.
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