Yes Gordon, to the diehard or experienced restorer of such things, said problems are not unusual I imagine but to some of us 'hobby' enthusiasts these mechanical setbacks do certainly add to the learning curve. Having recently completed some research on WW1 Lorry operations In Europe I am reasonably familiar about the somewhat extraordinary lengths they went to to prevent "frost damage" etc. and now one is fast coming up to steam re WW2 it seems. Your comment re the "thin" sections is noted. Just under 6mm was the guestimation for this area so one was careful not to strip the tapped holes when adding the special pins. Will certainly check as best possible before the bits are put back on. Thanks to the others for their words of support and yes Rick, after a good cooling system flush an amount of Chemi Weld will be added.
There is a bit of history re the engine/s. After securing the C60S cab chassis form the Hughes collection the engine was removed during the dismantling back to chassis. A donated 1948 Chev car engine (with smaller clutch) accepted the truck bell housing so it was temporarily installed to move the beast while the initial engine received some attention from a chap who was better skilled in matters mechanical. Long story short we were given another truck engine which has been re-engineered to take slipper bearings etc. All of the top end was dismantled and thoroughly checked however (and as we now know) the block wasn't. In amongst all of this we have had 2 complete engine/clutch/gearbox assemblies plus other bits including a cab donated to the cause which should arrive in a few weeks compliments of a generous benefactor. Another project will probably be considered in the near future. Busy times. Rod
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