One of these technical orders, or TOs for short, was the Flight Handbook, TO AN 01-20EJA-1. There is rhyme and reason for the TO numbering system, but it is too indepth for this page.
From this webpage you may download a copy of the Flight Handbook TO, the dash 1, as a zip file from this link, Tech Order 01-20EJA-1 Zip File This is a 424M file. It will take time to load. Right click on the link and select save as. This is a collection of JPEG images of scans from the original document. This particular Flight Handbook includes the B-29B and is dated post war, but not many of these manuals exist. I was pleased to be able to find a copy and have the opportunity to scan it.
There is also a folder on the web with the individual scanned pages. Some of interest may be a chart page showing the main differences between the various models of the B-29s.
There is another TO, the TO AN 01-20EJ-2, which was entitled Erection and Maintenance Manual. It too is a large file, however this one is in an Adobe PDF format. This tells you everything you need