just to be sure by HD you mean the Tillotson carbs "made for Harley Davidson" HD, correct?
Well, if you can lean it out enough.. maybe.. but a Harley has a lot more Pack and Punch than a 460cc clone engine
(and by that I mean combustion volume AND max rpm)
So they might be a hair too big (i.e. cannot be 'throttled' down enough to fit)
IDK, never tried, I don't even know the size of the Tillotson HD carbs;
but from my guts I'd say it'd be tough at least to find the correct jetting for a carb that's made for three times the combustion volume and rpm...
'sid