Computer chip and ET's

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Advancing the timing and adding a chip is not a good idea. The chip basically changes the rate of advance and the amount of total advance. A typical A9L computer adds 20*of advance so if you add 6* to your base timing (10* to 16*) and add 20* of advance you'll have 36*. Most computer chips state to use the stock timing of 10* because they change the total advance to about 24*, add that to 16* and you've got 40* which is outside the tuning window for a small block ford and you'll have detonation, there is no knock sensor in the ford system so the computer will not go to a leeser table.
The chip will help with the fuel curve but the timing change from the chip can be done by a turn of the distributor on a ford.