im rebuilding the yb this summer and just have a few questions to make sure im on the right lines

first of all should i rebuild the hydraulic lifters as they are noisy as fook first thing in the morning, ive read guides before on the vauxhall website on how to pull them apart drain the old oil are re-oil them.
Would i benefit much from this, also which one's are the good lifters? is it the ones that depress easily of the ones that are solid (if youve ever taken one apart you'll know what i mean)

Will i benefit at all from matching up the inlet ports to the manifold and taking out the casting marks with my dremel? i know that it helps an N/A angine but would there be any benefits on a turbo as its all forced air rather than pulled in

I have been told that diesel is good for soaking cylinder heads etc.. apparently its a great cleaner and also helps loosen studs etc. can anyone recommend this?