[SAJ]

TOM, I reseated all the valves, after truing everything with my valve resurfacer. Changed no. 3 exhaust valve with no 2 because 3 was a tiny bit thinner now and no. 3 runs hotter and leaner. Put in new head gasket (BEST brand graphite). Nothing else.
TBIRD, will look inside all with my scope and see what is what. Compressions are still 96 to 98 WOT hot, with 2 and 3 the 98's as they were immediately after the seizure 8000 miles ago. Knock developed 4000 miles later and I have run with it for another 4000 miles - I just checked all my records properly. It got worse after I replaced the spring and plunger with the bolt I think, removing some damping friction from the gear I guess.
PC/SR I will measure the wobble with a DTI tomorrow and the deflection when I push on the gear, which is quite a lot- I certainly saw .010 deflection when levering with a screw driver when the front cover was on.
The gear nut is so tight I cannot get it off with a 30 inch power bar and risk the clamp I used damaging the gear. I will have to remove the radiator and shock it off with a pneumatic rattle gun etc.
There is nothing I can see that can hit inside the cover. I guess it is a worn fibre gear, maybe set up loose in the first place. Schwalms have a great reputation though.
I will order 2 fibre gears , one oversize and see what happens. I think trying a metal gear might result in more noise, but I will get one as well.
Thanks again
SAJ in NZ