the 750 looks good man, really like that modified stock look, very seventies.
I (and I guess many others) would be VERY interested to hear more about the nikasil work you've done. Did they also supply the ally sleeves to be plated?
back to shock the subject, I had a deep look at the racetech site and the G3-S shocks are basically emuslion type (assuming you are not talking about the piggy back type which is not allowed in many vintage classes).
Even with the best shim stack / speed sensitive valving, there's only so much you can get from frothy oil....
That's why I doubt the worth of these high end shocks, that's all.
They do say in the site that you could order them with an IFP (internal floating piston) that separates the oil form air, "de carbon" style, but only above a certain shock length. Makes sense.
Now that would be a proper modern shock but as they say in the site, this option is only available above a certain length of shock, cant believe an IFP can be fitted to a stock 750 length shock, maybe on a racing only one, MUCH longer than stock, 14" or more.
If you have anyone to contact there, it would be interesting to know from what shock length onwards can the fit an IFP
Cheers
TG
from the racetech site:
Race Tech G3-S Custom Series for Vintage
# Non-Reservoir Emulsion - $699/pair
# Internal Floating Piston - (if there is internal length available) - add $50 per pair