Placed the order on Summit this morning. I went with the natural finish Holley timing cover, ACDelco valve cover gaskets, and ACDelco harmonic balancer. I'll update this thread when everything gets put on. Will probably be the better part of a year though, as I'll be waiting until the next oil change in the Suburban. Last one took a full 12 months to rack up 3K miles.
Thanks again for the input, everyone!
Thanks again for the input, everyone!