I have a funny story/embarrassing moment... When I went and looked at the truck that I purchased I asked the guy what the best way he found to start this truck (seems every old motor has a preferred way to start)?
I was standing by the drivers door, which was open and i was next to him... The hood was still up from when I was checking things out... He turned it over then looked at me with a blank look... I thought he was embarrassed because it didnt start on the first turn... I asked him to hit it again and he said it was running... I didnt believe him until I looked under the open hood and saw the fan blade turning...
I told him id have to fix that. It still had the stock exhaust. For several years i ran it with single in dual out through Flowmaster 40. Then I swapped the 40 out with a 10 several years ago. With the stock tranny and running 4.10 gears the exhaust is not as loud as you would think with the 10. I like it, and at least I can tell its running without looking at the fan.