Ah-ha! :)
Now, would I be right in guessing you are looking for an RCV style look with the Gull-Arm on an NC30? TYGA Performance bodywork too, by any chance?!
Well, given the similarities between the MC28 Pro-Arm mounting/shock/linkages and the Gull-Arm setup, and the similarities of the NC30 and MC28 Pro-Arms, I would say that it's not going to be too difficult fitting a Gull-Arm to an NC30 (or NC35), but understand this is pure speculation on my part! I think a couple of spacers on the pivot, or a custom pivot and new bearings, should see the swing-arm in place.
Running a 17" rear wheel will call for alteration of the geometry, so offer up all 3 sets of linkages and go for the setup closest (but taller than) the NC as I believe the NC range is too low to start with!
Shame you're not in the SW, I'd help you with it just for the hell of it! (Luke F. and I discussed it with Matt & Paul of TYGA Performance about 2 years ago while we were convincing them it would be a good idea to make an NC30 exhaust system!)
One thing you need to look closely at will be the routing of the exhaust. As with the NSR's, the Pro-Arm exhaust is tighter to the swing-arm than the Gull-Arm version, so bear that in mind.
Andy.
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