Welcome to the forum.
Sounds like you are in the same position that most of us are/were in.....some great ideas, but lots of questions. Well you have come to the right place for answers.
A couple of tips that might help out, check out the technical section of the site, it can be found here:
http://www.fefcholden.org.au/techinfo/index.htmlThere is a great decoder there that will give you more info on your wagon.
http://www.fefcholden.org.au/techinfo/idinfo.htmlFeel free to share the numbers and what you found. There are a few on here that compile this info.
Also get familiar with the search function at the top of the page.
Lots of info has been discussed on the forum over the years and it is all at your finger tips.
Don't forget the pics.
Above all else, enjoy what you have started.
Regards
Alex