I just attempted to change the Oil Filter in my 74. Is this a design flaw or is there a secret to changing it. It looked like a tight squeeze but I thought it would drop down between everything below it. Well no such luck. I ended up lifting the old filter out of the canister from the top and dropping the new one in from the top and then screwing in the canister. Is this the correct way to do this or do you need to remove all of that below to get the canister out. I also now seem to have a leak now. Tightening as much as I felt comfortable doing. In side the canister was a spring that I could not figure how it was to go back in. I thought maybe the original filter was smaller and needed the spring to hold it in place. I ended up leaving it out. It did not seem to do anything. The hole in the filter was bigger than the spring and the spring would have just moved up and down not doing anything. I checked the filter that came out and it was the same as the new one. Any suggestions or comments are greatly appreciated.