Ok. Please accept my apologies for things I've got wrong or misunderstood. That's why I'm hear... To educate myself and others(by showing what NOT to do). I will do my best to correct my mistake with some guidance.
That being said......
The engine I purchased was represented as a 5.7 Vortex. The motor currently in my 2000 Yukon Denali is a stock 5.7 Vortec which is original to the vehicle.
The new engine has a stamp on the block of 14093688. My uneducated interpretation of that was a date of manufacture of January 4, 2009. Am I wrong on that?
I'll be going to work on it this evening and if there are stamps or codes I should post, please lmk where they should be and I will post photos what is needed for people to help me out.
Thanks again to everyone willing to help me and I apologize for my ignorance on the topic but I'm working towards gaining knowledge and learning what I can.