Thanks for the reply53MP. The six was pulled by the previous owner. Have to admit I would have too. I have a '70 Monte and '79 truck manual. Honestly, never occured to me. The '66 manuals don't show much, less with a/c. I need to figure this out quick because the biggest swap meet in Metro Detroit is Sunday and it's great for getting anything. I also know where some '70's pickups are hiding in the weeds but it's an hour drive. Thanks again but I was hoping for some good pics or info such as # of grooves or depth of pulleys.