newb carb/intake question?

The OE, EGR valve can be blocked off by tapping the holes for bolts. A block off plate can also be done, you'll just need a EGR gasket. There a very high temp material, so regular gasket material won't cut it.
OR a 1/4 inch or so
(Might need a 1/2 spacer. It's hard to get a size inbetween a 1/4 and a 1/2.)
spacer under the carb to run the valve, which will not hurt wide open throttle performance since it (The EGR valve) is only open when vacuum is present and closes when theres no vacuum, as in wide open throttle.

The rubber hose. Is it at the rear/lower/passenger side of the carb?
Then it is a vacuum hose for power brakes. You can cap it or hook it up to a breather.

The gas line should be metal as far as you can run it. Rubber isn't so bad but will rot after some time and need replacement. Better off with the metal line in the long run.

I'm not sure about the OE throttle cable. I know you'll need an adapter from Holley too fit on the carb for it's use. I run the lokar cables on my carb. (Same as yours)

When you go to start up everything for the first time, will this be on a fresh engine?
IF not, just a small dribble down the carb once is the max you'll need and the fuel pump will fill up the bowls right quick.

also someone told me that some of the stuff on this carb i could take off that it was just there for emmisions, true? if so what is it?

No exactly true.

The carb I believe you have has 3 vacuum ports. The rear one mentioned above for power brakes or breather. I like to hook up breathers to help the crankcase stay clean.

2. A timed vacuum port for the carb. and 3. a full time vacuum port to run acc. items, like later MoPars use vacuum to help run the heater or older ones for headlite doors.