Barry in the UK sells a series of very well made GT750 related DVD's via the UK eBay site under his seller's id 'bluesmokebaz'. Reasonably priced and excellent quality - recommended ! This first one is a short history of the GT750.
This is a short clip from Barry's series on rebuilding GT750 carburettors:
Here is another sample clip that covers, in exceptional detail, the full restoration of a GT750
GS750/GT750 Transmission Conversion
Allan in Barbados offers a Japanese vintage bike gauge/clock restoration service. In addition to repairing gauges, he also likes to experiment in his shop and these clips from him give an over view of what needs to be done to fit a GS750 transmission into a GT750.