My old 87 had the hots, too, but we found that my fans were smashed and both the radiator and condenser needed replacement, because of the road kill, birds, prarie dogs, leaves, and car parts that were sucked up by the dam and bent the fins on the radiator and filled the space between the rad and condenser.  After replacing the fans and R+C, it works fine, a thousand dollar thank you later.  It now runs about 190-95 in cool weather (mornings) and 200-115 in hot weather (every afternoon), and goes up to 230-35 sitting in traffic.  Must be OK, cuz I'm still getting 23 mpg on my commute and 27-28 on highway trips.  Not bad for a V8 with 195,000 miles!

Also, here's my secret solution for not having to do all that again:  went to Home Depot and bought the curved metal screens that go on house rain-gutters.  Put a couple screws in the corners, and put zip-ties all around to hold it in.  Now the dam still sucks, the rad's cool, the road kill debris bounces off, and the screens cost a couple dollars and look pretty neat, if I say so myself.