The 10L43 chassis is a well known item among TV people. If you are patient, the folks in this forum should be able to guide you through the wild, wacky world of Predicta restoration. This article has some notes that may be useful:
http://antiqueradio.org/PhilcoH3412L...Television.htm
When I worked on mine, I found the Philco factory manual on eBay and it was useful to have that in addition to the Sams manual. Each one has a few things that the other lacks. My article includes a few pages from the Philco manual, but I recommend getting the entire thing.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html