Yup, sounds about right.
I also had all the mods. Dr Fred motor & Big valve Heads, cam, 42# injectors, 75mm TB, 76mm MAF, FMIC, Headers, Magnaport SC, OD pulley, You name it.
The EEC seemed to "Learn" a bit the more I ran it. After about 20 minutes run time, it would sort of hold a very lopey idle.
Idles sweet now, but only pulls 3-5 pounds vacuum at idle.