i have 1984 2.8l engine with carb problems it is a 2se and i can get a carb off of a 79 4.3l engine and it is a holley 2se would this bolt right up and run fine?

 

hmm... You could give it a shot, but I doubt they'll both have the same linkages... It may bolt up...

You could rebuild the carb you have... Here's some info on it:
Carburetor Factory - Rochester 2SE Exploded View
No correlation from exploded view # to actual description...

The Unofficial Guide to the Rochester Varajet 2SE/E2SE Carburetor
This one has a ton of very disorganized information...

There is also a manual available on the proper tuning and overhaul of this carb. Autozone has some information on their site as well.