i always get these things mixed up, like i said. when i think it thru, it seems to me it should be above, so when you open up the throttle, vacuum is applied that was not there before, causing the diaphram to pull the ign. plate in the dist. in the direction of advance. but then again, when you floor it, your manifold vacuum drops, so i thought it thru, and it's prob'ly the opposite of however i would hook it up the first time. as far as i know, you only use advance at cruise. i like q-jets cause they have little bitty primaries for low end torque, and big honkin' secondaries for high end torque, but my brother (ford man) swears by holleys.
if you hook it up below, doesnt that give you too much advance at idle?