I agree w/both of you guys on some things and no they aren`t spot on out of the box usually but close especially on a bone stocker. As Mark stated, they`ve drilled this tapped that and made it more confusing for the "average" guy if you will and THAT`S where a good carb goes bad in the wrong hands. If you go to back to the 60`-70`s holley blocks you see some unique stuff............it`s called SIMPLICITY ............