Their was a thread on this subject a while ago, but I could not find it. From what year cruisers can I get one, where the opening in the tub is the same diameter. I need a fuel filler neck for my 67' fj40.
I know that my 9/64 requires 4 small screws into the body, my 9/71 requires 3 larger screws into the body. Unless you are thinking of drilling new screw holes, you would want to stick to 62-67, according to SOR. 'Les'n the 40 is different from the 45 (SOR does not distinguish).
There's a 66 RHD 40 on Ebay and it has three screws. So 65 or 66 it changed from four to three holes. The filler shape stay the same until the 73 model. Around the 70 or 71 model the fuel system was no longer vented so if you use a later filler neck you might have to drill a small hole on the bottom side just below the gas cap like the earlier ones have.