Ever seen a vac pump installed like that?

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It's a sad story. Parker-Hannifin (Airborne) had an STC'd kit (Airborne kit number 312) for installing a belt-driven dry vacuum pump in Cessna 170B, 172, 172A, 172B, 172C, 172D, 172E, and 172F models with Continental C145-2, C-145-2H, O-300-A, O-300-B, and O-300-C engines. About four years ago, when Airborne stopped making vacuum pumps because of liability concerns, they quit selling the kit. I've searched high and low for a "new old stock" kit, and can't find one anywhere. Used kits do pop up at salvage yards from time to time.

The STCs that covered this kit are SA15CE, SA3-664, and SA3-663.
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are those rare ? just about every 170 I've ever seem had that setup, i thought it was standard ?
 
It's pretty common in the early 172's (as well as the 170's).
 
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