To get an idea of what a '28 engine rebuild involves, check out these two discussions:
1. Ray Holland's "School is in Session" PDF. This invaluable document tells the story of Ray (a Master Mechanic) rebuilding a 1928 engine and the online discussions surrounding his presentation. The PDF one of the Technical Articles that is located in the Members area off the main VCCA website (vcca.org). You need to be a VCCA member to access this area. Warning: this document is 250 pages long! A good read, though!
2. In 2017, I rebuilt the '28 engine that is my '27 one ton truck (Lurch) and I documented that journey here:
Resurrecting a '28 Four BangerCheers, Dean