With an overheating problem the first and about the easiest thing to start with is replacing the fan clutch, and as long as your are at it I prefer the Hayden 2797 severe duty. I've run this clutch on all sorts of Pontiacs and on stock fans from 18" to 19.5" with great results. When it engages on a hot day it does make some noise, but if you remember that it is pulling massive amounts of air through the radiator it gets much easier to put up with. Also like any thermal fan, it ramps up through the engagement process and only sounds like a helicopter landing on your roof when it is fully engaged doing its job.
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Mick Batson
1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress.
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