Andy,
Firstly, great job putting them back together! Top polishing job too!
Here is a pick of the (new 18 months ago) Genuine Boot Clamps on my 34L. The screw is genuine too.
The clamp gap isn't unusual. 1970's Yamahas used to close the clamp fully, but they also had pretty standard fork diameters.
This clamp is used in a few applications.
Just make sure they are located properly in the groove and the clamp is snug (not ridiculously tight, which will cut the boot off) about 1 or 2 mm up from the bottom of the boot.
Check to make sure they are still snug after a couple of weeks, then relax - everything will be fine from there.
Some points to note:
1. The holes should be at the bottom (although I think you have that right in the photo).
2. Genuine boots only have the holes around half the bottom convolute.
3. The factory position for the holes is for them to be positioned to the rear half of the fork (there will probably be some discussuon on this - most of the shit off the wheel comes from behind the leg, straight into the holes, but against this they will drain water / oil properly - and away from the seal & leg surface - to the rear).
Sensei Lambeth rebuilding your engine! I would love to know how much a full engine rebuild is costing you.
I'd just like to congratulate all the site members for the support they have given Andy during this part of HIS project.
This is what these forums are intented for and I'm grateful that the support comes when we each need it. Thank you all !