Learned the hard way!! Asking questions before purchasing. All the feedback gives all of us an education on what is best for the price decision. What works, and what doesn't. What is inferior, to what is quality. In the 70s didn't have as many choices as today.
On my 71 it is to small for the original filler tube. 70 and 71 there is a lot of things that are different. I can give you ID and OD to check 1 3/8 ID 2 1/4 OD