I had my car on the road for the first time toady after the rebuild. I picked up code 42 and 43. It seems like the SES light comes on only during "heavy" acceleration. Any ideas?

Engine Specs.
355, flat top pistons, zz4 cam, 10* advanced

code 42: Fault at electronic spark timing circuit OR
Fault at direct ignition system OR
Fault at fuel cutoff relay circuit

code 43: Low voltage at electronic spark timing circuit

Also, I was unable to find a home for this wire. I'm 95% sure it comes from the EST, which makes me suspicious. It has a black wire and a pink with black stripe wire. The car ran fine around the neighborhood over the last couple of days without it plugged in. But now i'm wondering if this wire needs to be plugged in somewhere.

 

ttt