Your MAP scaling does not look quite right. I like to use KPA. In KPA the values should be 100-105 at the top and like 10-20 on the bottom. 14.7 psi = 29.92 inHG =101.3 kpa.
Also, what kind of distributor is it? Do you have the ECU controlling timing? You're not going to be able to do much of anything if the timing is not being controlled by the Terminator.
Have you built a custom timing table before? The video below shows how. I'd create a new one from scratch and keep the current ignition config file in case you need to go back to it. Once you put the new file in then you're going to have to play with it and see what it wants.
I've used the image below as a place to start. In your table you have 33ยบ at WOT which is OK but a little conservative. Your cruise timing looks a bit low too. The ECU will add timing for cruise without vacuum advance.