Valves should have been adjusted @ 150,000 miles. The lift pump is a weak point. Check if an aftermarket solution has been installed, Vulcan, FASS or Airdog, all upgrades over the factory pump.

Battery cables are expensive, check condition. Check dash carefully for cracks or a cover. Another EXPENSIVE fix.

Mines at 128,000, been through all but the valve adjustment.

Robert

'68 Fury Convertible
'69 300 Convertible
'15 Durango 5.7 Hemi
'16 300 S Hemi