radiator "88 80

[PPSoccerwisc at aol.com]

Took it in to local radiator shop, next day they call and says it'll be $300 
and be done by the end of the day.  About an hour later I get a call and they 
tell me they can't get a radiator for it.  Hence I will do it myself.  Made 
one call to a retired mechanic, he called a buddy and I get to pick it up 
tomorrow for 249.00.  My question is what unwanting surprises am I in for?  
What other pieces should I be prepared to replace?  In a paragraph or so, 
will somebody be so kind to document the steps I need to take to properly 
reinstall a new radiator.