[gkmatthew]

I'm assuming you're working with a kit (for which you've made a variety of individual purchases).

They'll tax you on what you spent for major components. The forms they'll give you include the things they're worried about (chassis, etc.). These forms are geared towards the old kit cars of the 1960's, so you'll find some anachronisms (sp??). For example, I spent a TON of money on mail-order reproduction wheels. But, the tax list doesn't include wheels. I didn't feel any compulsion to volunteer.

Go armed with all the receipts applicable. When I went to the license bureau, I had my receipts separated into two piles -- one which I KNEW applied to items on their list, and another pile "just in case."

As to the weighing and certifying, all I can recommend is "ask around" your area. I happened to know ahead of time where such a facility was in my area, so it was a non-issue for me. Best bet -- when you first go to the license bureau to get your various forms, ask THEM -- they're the ones who want the info, I'm sure they can tell you where to get it done.