Ok, I set the tappets once I'd fitted the cam/SUs/extractors to Toyota's 10 & 12 thou, using my usual method of getting a cylinder to TDC firing and setting both valves.   Later I was reading Crow's paperwork and they said 16thou, so I opened them up. However they were noisy at that, so I've just closed them back down to 10 & 12 at TDC.   However, while doing that I noticed that the valve on another cyl had a larger gap than I had set it to. A quick think & I realised that at TDC