[Catnip]

68XR7 302 with Holley 4V carb. Cars runs rough at startup/idle.
Was told to replace this carb with an Edlebrock 4106 4V carb.

Holley has been rebuilt 2 times. Should/can it be rebuilt a third time?

 

[69XR7ragtop]

Sure it can be rebuilt again..lots of times actually.
When you do, make sure the power valve is replaced as well, and that there are no vacuum leaks anywhere.

 

[KTL cat]

Tom at www.ktlrestorations.com I use Chris's Carb Shop ph1-877-498-2272 Dayton OH I am very happy with his work

 

[67bigkitty]

Rebuilt dosen't mean it wore out, and it less cost.

 

[woodsnake]

As others here have stated many times, most carb issues are actually ignition related. If the carb is solid, a quick kit is only 25 bucks...Or a new one may solve your problems. I would try the kit first, then look at a new one if that doesn't help..

 

[Catnip]

What's a "quick kit"? What is a "power valve"?
What should a carb rebuild/jetting cost for this carb?

 

[woodsnake]

http://www.summitracing.com/parts/HLY-37-1542/

http://www.mustang50magazine.com/techarticles/mump_0907_how_to_understand_the_holley_4180/photo_17.html

The 4180 isn't that great of a carb, but this page illustrates the parts...
Also, I would not replace a Holley with an Edelbrock. The Holley is just easier to hook up. I would look at other tuning issues as well, you may not need any carb work at all...
Have you pulled and inspected a spark plug for a color check?