Sounds like the EGR situation may not be helping. Th valve is still installed, I just unhooked the vacuum to it. The thermostat is switch is long gone and all the vacuum lines were rotted. With all the TCS stuff gone, the vacuum advance is now hooked up directly to a ported source on the carb.
I just tested the EGR and it holds vacuum. The vacuum advance does not so there’s a likely culprit.
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Ken
'68 GTO - 464 - Ram Air II heads - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac ( build thread | walk around)
'74 Ventura 350
'69 AMC Javelin SST
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