In other news, to deal with the dead battery issue (and always low voltage reading on the dash), I installed a new 94Amp 12SI alternator for an '84 Camaro 305H.O. (bolts right in). Wow! The voltage gauge never read so high! And wow the truck ran well! And the signal light flash with authority! Impressive.
Dash gauge usually sat at 12-13V at idle, less if anything electrical was on. When the cooling fans were on (30A), the truck struggled to maintain 9-10V on the gauge. Add EFI to that, plus an inverter to run the lappy, then sit in traffic - no wonder the battery died.
For sale: used 10SI alternator from 1977 Chevy C10, low voltage edition.....