Several people have built and are building T buckets on this site. Check out the Project Journals and scroll to the bottom of the page and click on "To view a list of all Hotrodders Project Journals, click here." link. This will give you all the journals that have been posted. Some have a few entries and some have complete builds. There is no search function on these pages so you will have to check them all out to find T bucket journals. As well you should check out the National T Bucket Alliance web site and join them. Here is a link to there tech pages where you will find a lot of info you might want to know.
Here are some links to some of the T bucket journals:
And here is another build:
Good to hear you will be building this with your son. Good luck with your project.