Mine is the 625 and it was pretty much just right out of the box. Although I bought it used off ebay needing repairs. The secondary air door spring was missing and it needed a few other things. That's the cost of gettin it CHEAP. But the thermoquad air door spring fits perfect and other than that all I did was put a new kit in it and adjust everything. Runs like a charm.
The 2 625s on the duster I got a couple years ago on Christmas sale for 288 each and then sold the old edelbrocks for $150 each... So basically for $276 I got two brand new carburetors...
On the 750 I had Holly put me on a factory refurbished list and when it popped up for 239 I got it.. when I got here of course I opened it up to set the floats. They were way off as always and it actually still had solvent from when they I guess flow tested it or whatever and it had metal and trash in it and it was missing another bolt in the installation kit. I called them and they just sent me a brand new carburetor...