Been holding this for a while Kenny. I think we should make it your theme song.
http://www.youtube.com/watch?v=nPL7nN99jno&feature=related
My 96 has a vibration just off idle, but goes away at 1500 RPM. When it started I looked at everything, but nothing helped, so I decided to run it till it...
If you are running the original single thermostat crossover, there is no need for this. Bill does this for the dual thermostat crossovers because they don't have the blocking thermostat like the old singles do.
The fan clutch for the 97 has a 3.81" bolt circle. The original clutch for the 94 has a 6" bolt circle for the 6 blade fan. What kind of fan did you truck have on it?