I concur with Kmoose, ample torsional strength is provided by the cap and cockpit insert. The cuddy cap is stout enough to walk on. Plenty of lateral shear strength, I think. Also you have those vertical pillars (your vertical seam)inside the gunnels adding rigidity.
The bulkhead is effectively is a minimal load-bearing wall creating a separate cabin. The turn in toward the door also adds stability.
On the Seafari, the bulkhead is connected to the cockpit insert w/ 4 screws on each side and to the dash with 4 or 5 more no glass or epoxy on either of the joints. The 21 has no bulkhead and you can still walk on the fore deck. The Seavette has 2 sets of bulkheads and I don't remember that either of them were glassed to anything, just some dabs of 5200 or potter putty, and maybe some after market lifecaulk or same.
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