So I used the below thread and first post as well as 13 for the P/N’s to purchase pretty much everything less one of the hoses (which I bought but ended up refunded as they must not have really had it.

https://www.performancetrucks.net/fo...inside-548851/

Hydroboost is new Ac Delco unit ($280)
AC Delco firewall gasket
PS pump is new AC Delco unit ($172)
Brake master cylinder 2003-2006 Escalade (used - $81)
GM Power steering hose 36-353800 ($50)

Would still need to source 36-365463 Looks like Rock Auto may have the hose and for less than what I would have paid - https://www.rockauto.com/en/moreinfo...sn=907&jsn=907

So I have $583 wrapped up in this setup. SOLD

 

Sold.