That's a baby cam.
It's the price to finish that will get you. A $300 carb isn't the best choice for a hipo 427ci SBF.
Some of your other prices are on the very low side too.
For a comparison, I just did a 427 with AFR 205cc heads, a Dart Sportsman block, Comp solid roller, Super Victor, Quick Fuel carb, MSD Pro-Billet distributor, Comp gold rocker arms, Moroso pan, etc, etc. It came up to be just under $11500 with a new 100A alternator, CVR gear drive starter, etc. All brand new parts, all top notch stuff. That price was assembled and dyno'd.