Well it is half buried in one of my storage buildings but I was able to check my spare 261 (54). It has about a 6" tube, from block to open end, and about 15" dipstick, from tip to "washer". And this engine has the filter option. Its seaming more and more to me that the tube in my 55.1 is not the stock tube, I looked more closely at it comparing it to the tube in my 54 261 and even noticed that it doesnt have the rolled lip to it where it seats to the block.
