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- - A/C Hester Box Changes 83 VS 86 (https://67-72chevytrucks.com/vboard/showthread.php?t=861404)

aotte1

10-31-2025 01:14 AM

A/C Hester Box Changes 83 VS 86

What are the changes made to the 1986 A/C heater box under the dash Vs the 1983 box? Vacuum line diameter increase in size is one, others.
Also, what are issues Iif installing a 1986 A/C under dash heater box in a 1983 truck?

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