[30westrob]

If you suspect idle mixture issue a good test is after everything is warmed up pop off the linkage rod from the pump, then slowly move the pump arm only to increase pump output. The idle should increase initially as you add more fuel then as you continue moving the pump arm the idle will decrease as the mixture is overly rich.
If the engine speed does not increase initially then your pump slow speed mixture is too rich.
Long ago I had a 72e. Best running long hood I ever owned. Rob