You need to clarify your post a little. You have an 87 TBI fuel injected V8 350 with a carburetor

-So do you have a carburetor or tbi?
You relived your distributor cap left to right?
-not sure what this means. Does your distributor move or is the cap loose?
EST is electronic spark timing. In order to put the spark advance in bypass mode to set initial timing you need to unplug the est connector brown/tan wire near the bottom of the master cylinder.