You have to take the panel off that is is in front of the radio first. This may be the most time consuming part of the job. Then you will see screws on the left and right of the radio. Remove these...
I believe my 1995 Century has the same motor (3100). My gap setting is .060 inches. You can double check in the "capacities and specifications" section in your owner's manual. Or triple check on your...
you would have to change the heads and timing cover
no you dont have to swap heads or timing cover! it is a direct swap! motor has been in the lumina for about a month now its running great!