What is the Trinitarian view on those who died prior to the New Covenant and did not partake in the emblems?

What are you talking about as "emblems?" What does that have to do with salvation? Are you talking about the ordinances (Lord's Supper, baptism)? These aren't necessary for salvation. Job and the thief next to Jesus, along with other believers are in heaven. Those under the old covenant were saved by faith just like in the new covenant. Their faith was in a future Messiah who would take away the sins of the world.

we are saved by faith in Jesus ALONE, when He came and died for our sins and rose again in the New Testament.

those people in the OT are saved by faith in GOD too! let me show you the verses!

Hebrews 11

By Faith

1Now faith is being sure of what we hope for and certain of what we do not see. 2This is what the ancients were commended for.

3By faith we understand that the universe was formed at God's command, so that what is seen was not made out of what was visible. 4By faith Abel offered God a better sacrifice than Cain did. By faith he was commended as a righteous man, when God spoke well of his offerings. And by faith he still speaks, even though he is dead.

5By faith Enoch was taken from this life, so that he did not experience death; he could not be found, because God had taken him away. For before he was taken, he was commended as one who pleased God. 6And without faith it is impossible to please God, because anyone who comes to him must believe that he exists and that he rewards those who earnestly seek him.

7By faith Noah, when warned about things not yet seen, in holy fear built an ark to save his family. By his faith he condemned the world and became heir of the righteousness that comes by faith.

8By faith Abraham, when called to go to a place he would later receive as his inheritance, obeyed and went, even though he did not know where he was going. 9By faith he made his home in the promised land like a stranger in a foreign country; he lived in tents, as did Isaac and Jacob, who were heirs with him of the same promise. 10For he was looking forward to the city with foundations, whose architect and builder is God.

by believing in God, and loving Him, and by doing what He commanded in the OT, those people were saved!

God is the same, yesterday, today and forever amen!

This is not a historic Christian belief.

The phrase "covenant for a kingdom" is usually associated with Jehovah's Witnesses.