ok thanks guys
i have run through almost all of the "surging idle" checklist
when i dc the iac i can set it to about 600 rpm but it does surge by about 100 rpm
i haven't replaced any vac but it all looks good
i have replaced or tried w/ a good one of the following
plugs(gapped .040")
wires
coil
msd
cap
rotor
maf(both the body and sensor separately)
tps
iac
timing @ 12*
i have reset the puter after any changes
still hunting a low rpm stumble, it smells unusually gassy (i have owned a 5.0 w/ LT's and offroad b4 so i am used to what that one smells like)
ET seems off by 3-5 tenths, mph is off by about 3 mph too
the miss is at idle to about 2000, i don't feel it after that, but feels like a stutter, kind of shaky and worse when i'm driving it rather than just giving some throttle
i have a buddies distributor i can swap out to try, but after that i'm lost
i feel i have eliminated 98% of the possible prob, and getting irritated