B Block Rear sump oil pan

Other than an aftermarket pan, I'm not aware of any rear sump pans with an internal dip stick. The truck/van pan has a 90 degree fitting on the side of the pan and a long threaded tube. There are a variety of lengths depending on application. Some motorhomes have 6' dip sticks! I think the pickup ones were the shortest of that design. They have a strap that holds the upper end of the tube to the drivers side exhaust manifold.