i have a 85 s10 blazer 2.8 4 speed i recently pulled the engine out of to fix a clutch issue and now its running real rough like only 5 cylinders and is idling really high. has anyone had a problem like this before? im thinking maybe a vacuum line?

 

Probably a vacuum leak somewhere. You can spray carb cleaner around with the engine running to find it. Just be careful, the stuff burns rather well....

Once you fix the vacuum leak, see if it runs better, if not, let us know.