I went down to the quarry this morning. Nice guys but they said they're not "certified weighers" and the state will reject the slip. I don't think it's the first time they've been asked. Who knows if that's actually true but anyway.
I've booked a tow for tomorrow to take it to the CAT scale that's 30 miles away. I called a few places and found one that tows for the school districts and hospitals and quoted the lowest price. $125/hr. Which seems incredibly reasonable. Probably 4-5 hours max (taken from the time the wrecker leaves/returns to the yard). I'm happy about that price. I was expecting it to be more like $1k.
Funny thing was when I talked to him, he all but finished my sentences when I mentioned the fact that it was a conversion. I think they've done this a few times before.
Thanks for everyone's help. I'll let you know how it goes. I will be glad to have this behind me.