.
give it way more gas.
don't rely solely on the afr gauge . put tape over it for now.
do the timing test.
you said it does not have vacuum advance but the computer controls the vacuum advance . this is not possible if you do not have a vacuum can attached to your distributor.
I'll admit, when going through MSDs instructions for Atomic timing control I didn't see how that stuff could work, but every piece is stripped off the distributor in the process, including vacuum advance. I'll force some AFR changes in the handheld and see what I get.
ok good . it is too lean at steady throttle and wide open throttle, so i would go up at least 1.5 everywhere if that makes sense . in other words, if there is a separate system to make it richer a wot like a power valve does, make that circuit richer also.
then post the timing test after you get around to it.
if it wants more timing, you will need to add it.
you must fix every little thing you find after all the the things are corrected, we will have a lot better idea what the problem might be if it still exists.
.