did you check for any corrosion blockage of your water pump/timing chain cover (long term storage) caused a corrosion problem in mine
well,---my 1969 340 barracuda has a overheating problem !! upon investigation/tear down concluded to the fact that the passages in the timing cover/water pump housing are corroded shut .... cleaned them out with a scraper and a shop vac. not sure if there is enough (meat) on the passenger side to seal the pump properly//half way to a timing chain check,,,
