I would call Classic Parts and ask them directly if the sending unit is AC Delco. I would doubt that it is, since ACD is a selling feature that all vendors emphasize. I would keep searching google for a good price on that ACD sending unit. If you get a cheap sending unit you will likely have to watch the bouncing gas gauge, which drives me nuts, so I only look at the gas gauge when I first get in the truck.
$110 with free shipping sounds good to me, but you have to call for availability. If oewarehouse does not have it, try oehq. or google.
http://www.oewarehouse.com/ShopByVeh...@@3338&mode=PA