I recently bought a timing light and checked my timiing after the car warmed up. It showed 20 degrees. I then followed these instructions Checking, Setting and Bumping up your Mustang's Timing. I set the timing at 10 degrees with the spout out. What happens is when I tighten and connect back the spout and check the timing it seems to go back to 20 degees. Am I doing something wrong here? Also does someone know the size of the tee fitting so I can connect a oil pressure gauge and keep my stock one.
87 Mustang 5.0
87 Mustang 5.0