this might help
Mopar Classic! 1968-74 NOS OEM Five Button Type A/C Heater Vacuum Switch 3502126
All C Body Cars
Chrysler Dodge Plymouth: 1968 1969 1970 1971 1972 1973 1974
AC / Heater Control Blower Switch (without Auto-Temp)
NOS OEM Five Button Mopar A/C Heater Vacuum Push Button Switch OEM # 3502126.
This is a switch with seven vacuum hose nipples and five electrical terminals. This replaces many different Mopar switches. (3431020, 2820487, 3895033, 3895790) reason I posted was wanting to buy for my 1970 charger and it is not the right one.