to install the plug correctly you have to at least pull the trans back and the flywheel off, but i have heard of guys being able to reach it throught the distributor hole, i opted to pull the trans back because it was easier than pulling the motor, if you drop the plug you will most likely have to pull the pain to fish it out , this particular plug is a threaded plug, hope this helps you out some, this also lends a good lesson: it is a good idea to prime a new motor when it is on the stand with the valve covers off to make sure everthing is oiling properly