Hi Art,
Yeah, looks like you got the whole set of castings and parts for Dinky!
They sell a set of drawings for it but it looks like you've got those too.
I'm one of the people doing Kozo's A3 and I can tell you it's been a lot of fun for me. I'm learning a lot, but it is a big commitment. If you choose to do this, you're in for a lot of work. But it's fun. And while instructions in Kozo's A3 book won't match exactly what you'll need to do, the techniques and procedures will be applicable.
Not sure I can advise you on whether to take on a project of this magnitude or not. If you're interested in it and excited about it, then go for it! If not, it might be best to re-home the kit and focus on something you're more interested in. There's nothing quite so demotivational as trying to force yourself into doing something for fun that you're actually not passionate about, right?
I don't know what you paid for the lot, but you have $720 in castings and blueprints, plus a lot of additional copper & such that they don't seem to sell through the Friends site. At least not anymore. I wonder if they used to sell it as a full kit? Kinda looks like it.
Anyway, good luck with whatever you decide!
Kim