A slightly larger boom won't make any difference at all. The only issue you're going to have is the gooseneck connection to the boom, which is performed by a custom cap you won't have.
it by simply bending a pair of stock stainless strap tangs and bolting them to the side of the boom. Easy solution.
If your mainsail
is loose-footed, you can make a boom out of a simple piece of round aluminum
tube of the same O.D. and I.D. Bolt a section of track to the top of it and put a track-car or sail slug (depending on the track type) on the clew of the main along with an outhaul
that bends back through the interior
of the boom to the main, and then bends back to the cockpit
Lots of ways to skin this cat.
P.S., I have a carbon fiber tube of the right length with stainless tangs as described above in my garage that you can have if you pay for the shipping
. You'd have to install whatever track is needed atop it.