Dellorto 25mm jetting...
On that setup...
I'll take a wild stab in the dark.
I'd start with a D29 needle 2nd clip up from the taper, 266 tube, idle jet of 52 & a main of 110 & see what it does.
Might be good. Might be way off. Gotta start somewhere.
Maybe put a larger aperture float needle valve in there to be on the safe side. 250 or 300 depending on your level of overall paranoia.
Saw a link with someone using an LTH reed manifold on one. Might be interesting? Might make the jetting a little more forgiving.