I've got a 1985 360 GLT with VDO gauges but a B19E engine, whereas I thought up until a year or two ago that the Smiths instruments went out at the same time as the B19E.
It might seem to be heading rapidly into rivet counting, but there's a vaguely useful point to it - I once bought a set of 'extra' gauges (i.e. econ and ambient temp) from a (late) Smiths set, and was understandably grumpy when they didn't fit my VDO cluster...
cheers
James