The only magazine that I consider of value for restorations is "Auto Restorer", 1-800-365-4421. It covers tool tips, how to information, everything you need to think about for your retoration.
Join the VCCA for the use of the technical experts. Those guys, like the Skipper, will take the time to help you solve problems. The magazine, the Generator and Distributor (G&D), doesn't have much in the way of restoration advice but there is an excellent parts for sale section and you get it free for joining the club. In the beginning and if you run into trouble finding a part I would pick up a copy of Hemmings from your local news stand, it's not a magazine you need to come to the house every month.
This is one of the best web sites for asking technical questions about various aspects of the restoration process. The other is
www.chevytalk.org. That site has a lot of members and a lot of technical advice also.
The first thing I would do is follow MrMack and dusty's advice and order the shop manual for your truck. Log onto Chev's of the 40's web site at
www.chevsofthe40s.com and order the manual from them. The reason to do this is so that they will send you their catalog. They have the best catalog out there with pictures of all the parts and all the parts listed by part and group number, the way chevrolet logged them. It wouldn't hurt to pick up a body manual also.
Next I would log onto E-bay Motors and find a parts catalog with at least a ten year spread, say a 38 to 52 parts catalog. That will give you all the parts that came with your truck but also list parts that are on other models that are the same as the one you are looking for. The parts catalog is an invaluable tool.
Have at it! Good luck! Let me know if I can help further,
Brian