When i put my cam in everything was apart.I dont think 1/2hr will cut it.It is a big job.If you are going to do this job get some cardboard and make a jig pattern of the front cover.When removing the bolts put them on the cardboard jig.And put a new seal on the crank.The seal kit will come with a plastic ring ,it is a tool to help the seal go in.I used permatex right stuff instead of a gasket.