[QUOTE=ossw1]I just replaced my radiator last week on my 81. I took the fan off and unbolted the fan shroud and took it out. Took off the the 2 upper radiator clamps and the hoses then I lifted the radiator out.The whole job took 30 mins. I found out that I had a leak in the lower corner fins. Never would have seen it unless I took out the radiator.[/QUOTE]
30 minutes, WOW!  On my '72 it's more like 30 DAYS.