I Peter 3:18 "For Christ also hath once suffered for sins, the Just for the unjust, that He might bring us to God, being put to death in the flesh, but quickened by the Spirit:"
I Peter 3:19 "By which also He went and preached unto the spirits in prison,"
I Peter 3:20 "Which sometime were disobedient, when once the longsuffering for God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water."
As soon as Christ was quickened by the Spirit -made alive, he went and preached to the spirits in prison (which we know from Christ is to one side of the gulf), people as far back as the days of Noah. That's the one reference I've seen to Christ preaching to one side of the gulf.
Our Father is love for sure.
The "one side of the gulf" is defined as "those who were disobedient long ago when God waited patiently in the days of Noah..." - 1 Peter 3:20
Is that the side of the gulf you were referring to?
Matthew 12:40
For as Jonah was three days and three nights in the belly of a huge fish, so the Son of Man will be three days and three nights in the heart of the earth.
Note: Christ was laid in an above ground tomb. Where is the heart of the earth?
1 Peter 3:18-20
For Christ also suffered once for sins, the righteous for the unrighteous, to bring you to God. He was put to death in the body but made alive in the Spirit. 19 After being made alive, he went and made proclamation to the imprisoned spirits— 20 to those who were disobedient long ago when God waited patiently in the days of Noah while the ark was being built. In it only a few people, eight in all, were saved through water,
Ephesians 4:8-10
This is why it says:
“When he ascended on high,
he took many captives
and gave gifts to his people.”
9 (What does “he ascended” mean except that he also
descended to the lower, earthly regions?
10 He who descended is the very one who ascended
higher than all the heavens,
in order to fill the whole universe.)
1 Peter 4:6
For this is the reason the gospel was preached even to those who are now dead, so that they might be judged according to human standards in regard to the body, but live according to God in regard to the spirit.
Romans 14:9
For this very reason, Christ died and returned to life so that he might be the Lord of both the dead and the living.