One topic I am well versed in since our company made the shrouds for those years... the comment above earlier is correct blade should be half in and half out of the shroud opening to be most effective.
Few more tips.....we supply the companies with the wider bottom brackets and rubber bushings so if you have the narrow rdiator and upgrade to the 4-row (core) radiator you can do so and have it fit properly.
Another tip if you have a clutch fan to see if it is working properly have some start your engine while you observe the fan rev it slightly and shut it off....the blade should take a few turns and come to a fairly abrupt stop....if it kind of free spins when you shut the car off the clutch unit is BAD.
All this has a bearing on the temps......
Course if you are not running a full surround radiator shroud....get one....it was an option and if your car had ac it was standard....again going by memory on this.
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