Interesting Cooling Fan find Leads to Better Solution I've seen here on the difficulty of finding the right adapters and most efficient cooling fans for bolt on ease. I just got around to inspect what my 57 Silver Hawk had on it from the Nevada desert which turns out to be a early fiberglass fan and an aluminum hub adapter S-008 made by Flex-A-Lite 25 years ago. A quick phone call to their tech help and a search at http://www.flex-a- lite.com/ I was recommended to trash the old fiberglass unit for safety. I gave him all the measurements and turns out they have all the solutions. The hub part #876 allows for a 1" hub so on a stude you would need to turn it out to 1-1/16" - an easy fix.. This hub already had that treatment so I don't have to do anything there. As for the proper flex-fan - perfect match. The FlexALite 1818. 18-1/4 diamater, 2-1/2" projected width creates a constant high static pressure, low noise movement of air as it's 7 blades. I found it for only $48 at Summit Racing. http://www.flex-a-lite.com/auto/html/belt-driven-fans.html Well one less thing to worry about and I hope I could help someone find the right fan. They have a huge selection of electric fan set-ups too as they claim to be the pioneer of these. They also sell a easy to mount heater unit to simplify the stock set-up.. HammondA100 - SDC Forum - July 2010