Hi just wondering if anyone can help me with a discriptive way of changing my head gasket on my 1987 2.5TD, or a website than can help i have basic mechanic skills but can work to pictures or description

easy job on one of those ,drain engine by removing brass bung on passenger side of block half way up in front of exhaust down pipe ,head needs checking for crack in the scalloped part between the valves and on hot spots and around ,have a look here its the same job as 2.5na
http://www.landroverweb.com/Pdf-files/Manuals/Defender-90-110-workshop-manual-2.pdf