....Ralf...what you been drinking mate? Engine rotates clockwise when viewed from crankshaft pulley/cam sprocket end.....belt tensioner is on slack side of belt.....tops of pulleys move toward front of car..... (well, mine do!!)
Marconi. Solid lifters in the 12V motor...but by all means find out how hydraulic ones work
Given the front cam has stopped at 'no lift', I'd pull the rear cam cover next and see where that one is at. If it's on or near timing marks, you might be lucky. Try gently moving each cam a wee bit either side of where they are to see if they move OK (expect some resistance but nothing solid). If yes, next step for me would be to put a new cambelt on it, time it up and see if it'll turn over by hand OK. If yes, do a compression check. If this is OK....put it back together and fire it up. Only think about pulling heads if you are sure it's lost lots of compression (suggesting bent valves).
Re the engine bits I've got...car is running at the moment with two very, very knackered cams and one grumbly big end. Emissions at the MOT a couple of weeks ago where excellent, so the valves & rings are good for the age (112k). If I can be bothered to do the job (some doubt in my mind at the moment) I intend stripping down, checking/cleaning/reassembling the spare motor I bought, then dropping this into the car. This would leave a more or less complete (would have to nick fuel rail, inlet runners maybe one or two bolts but nothing major) engine going spare. If you had decent cams, they would drop in to the heads no trouble, set the gaps and job done. Shame it's not just cams TBH, but the bottom end isn't good on the current engine.
Some ifs & buts...but if I do the job, I could pull the heads and ship them for you, if it turned out you needed them....but TBH, valves and guides are cheap enough. If you have to pull your heads, get them stripped, identify any bent valves, renew those, check the guides, renew as needed, probably a light skim for sanity, reassemble... Certainly simple to just drop on a pair of good heads. Probably not alot in it proce wise either. Make sure you use good gaskets by the way, not cheapo ebay specials. Ask me how I know....... I'd suggest Alfa or EB spares. Goezte are good.
Have to say, I quite like working on a V6 when it's on the engine stand...but in the car? Bad enough doing a cambelt...pulling the heads sounds like torture to me!! I'm clearly getting to old for this game