Again, thanks for the feedback.
Have acquired a budget compression tester from the Auto shop and watched the YouTube video from Rover.
(From what I can make out, the 6mm deflection of the belt is horizontally at the top; the 19mm Haynes mentions is on the vertical halfway between the exhaust camshaft and crankshaft sprockets ...)
Anyway, for the next step I've decided I'll try and get the sprockets lined up in the correct positions, put on the replacement belt, tension it up temporarily and then check compression before pulling off cam covers or head and investigating further.
Like I said earlier, I can find the timing notch on the crankshaft pulley but can't seem to find an adjacent mark on the engine proper to align it with? Am I missing something here? Maybe inserting the dowel rod to lock the crankshaft sets it at the correct spot??
Bourbonmog, you mention you have got a cam lock tool. Would it be possible to get the exact dimensions of it so I could maybe dummy something up out of scrap metal that would do the trick?
Thanks.
Col.