Those R1s are already starting to fetch money Paul. I was at High Beach one day when a fella turns up in a van - he'd just come from work on his lunch break - in the van he had the panels from one of those R1s all freshly sprayed from the painters in........red and white. This was a few years ago, and he was "restoring" it - even then a few folks knew they'd be worth looking after.
There was a book when I was a kid called "Superbikes of the Seventies" - those are more the kind of things I'd be interested in, plus the stuff I rode in my youth, hence the YPVS and early GSXRs, RG500s - but all those are already silly money - except the Exup, and I can't fathom why not cos it was a brilliant bike, and looks the nuts even now. But I do think that will be set to change soon.
Yeah darrsi, the Slater Brothers took the Laverda 3C I think, and gave it hairier cams etc, Laverda produced it as the Jota for the UK only - it held the record for the fastest production bike for a number of years - a genuine 140mph.
The Montjuic came later - 1980 (that's when Bike magazine tested one anyway) - I've recently been told it was designed as an entry level Laverda (the Jota was £3000 in the early 80s). Had it's own race series apparently. Never seen one in the flesh since those days, pretty little thing though, and as Paul said, very loud! Bike reckoned it was a bit of a hooligan bike in those days