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Whistle Pigs Are Cool
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Discussion Starter #1
My local Chevy dealer was able to pull up the 6.5 alternator pulley part number.

#01989104 AKA #19891040

Outside Diameter: 66.7mm / 2.626in
Inside Diameter: 17mm / 0.669in
Overall Thickness: 32.3mm / 1.272in
Serpentine Grooves OD: 62mm / 2.441in
Grooves: 6
Nut Recess Depth: 17.8mm / 0.701in
Center of Rear Groove to Rear of Pulley: 9.9mm / 0.39in
 

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Thanks, Grabowski! I just bought one on-line thanks to your help. I have a smaller than typical gasser pulley (2 3/16 flange to flange as opposed to the typical incorrect gasser 2 3/8" pulley). The indicated rpm's are driving me nuts. To say nothing of the belt tensioner range limitations.
 
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Let's take the Truck!
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Nice. I have some measurements to take.
 
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