I've got the pieces/parts to put together probably one of the best 750 motors ever and it's going to be mild by comparison to a DS1000... Despite having 2-3x the $ into it that could be used to buy a DS1000...
799 hi-comp kit
900 diameter valves
900i.e. Cams
Dry-clutch
695 6-speed trans
749 charging system...
& 40mm flat-slides
Still going to be slow... :-/
(BTW, a BIG +1 to the above quote...)
Who in their right mind would fix up a 750?