Call/email the ambulance builder AEV for any special modifification part #s in the ambulance package.
NAPA has this one for ambulance package.......
Item#: NBH25061110
Price: $45.29
tax and shipping not included
Disclaimer: The stated price may vary from the in store price and may change at anytime.
Attributes:
# of Ribs:6
Angle Degree:40 Degrees
Features & Benefits

esigned with Long Wearing Fiber-Loaded Stocks for Greater Load-Carrying Capacity. For Replacing Original Belts on Serpentine Drives & Other Heavy-Duty V-Ribbed Belt Applications.
Imperial Length:111.63" (2835mm)
Top Width:.807" (20mm)
Napa web page.........
As stated the correct installation is vital.............
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http://photos.thedieselstop.com/show...0/ppuser/28329
93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93 has 160K+, it's basically a stock truck with all the Ford options, just no disc player.
Toys: 26'Jayco FK TT, 18'Sylvan Pro Fish.
Proud Canadian BOOB man too!!