G'day Brandis.
As per berger I heat the head to 200 C and freeze the guide. I assume you have a ci guide. Make a driving tool that goes in the guide 3/4 depth with a few thou clearance. Make sure you have it all set up before you start (flat timber and rags for head, tool inserted in guide, gloves for hands, FBH). It may start to grab 1/2 way in but a few good clouts with the FBH will see it home. Once done you will probably need to cut the valve seat.
Best of luck.
Cheers