tappets

Hi all...I am totally new to the site and I need some quick info on a 1986 380 se a/t I am looking at buying. The engine is quite noisy which I presume are tappet adjustments. Are they hydraulic are manually adjustable? If they are manual what are the specs (both inllet and outlet, hot or cold). Also I need a fuse box layout as the original fuse cover is missing. If I do buy the car I will purchase a workshop manual but for now I just want to make sure the engine is okay. Thanks in advance for any replies.