I just purchased the correct dipstick (according to research that has been posted) for my 69 Z28 on Ebay for $89 bucks! Anyway, my question is: What is the correct length for the tube? I have a new tube in a GM package that was supposed to be for a small block and measures approx 10 ¼ going around the bend. The guy in Canada, where I bought the dipstick, said his tube (which was being sold separately) is 7 1/4. I searched through previous postings and haven't found anything specific to the length of the tube.