Jonesey, The ally footpeg mounts/exhaust hangers are a different shape and the mounting holes don't line up (exactly) though they could most likely be modified to fit. Tha American "H" models actually used the Special exhaust on them so they're not too far off the mark.
Ermm, Jeff...... the Special pipes actually pull up just short of the axle leaving unrestricted access to the axle.

It's the lower shockie bolts that are a hassle to get at.
The brake padal will be the biggest issue, but wouldn't be too hard for someone like you to make it work.
Here's a link to the interchange thread on this subject on the dotcom site -
CLICKYNote that all their references to the parts fitting are based on a "without modification" basis.
Pretty sure most of us could make them work with minor "tweaks"