Cleco'ed the Fwd fuselage floor to the Center Fuselage spar stiffeners. Fit the fwd side skins to the frames upper longerons and center side skins. It all fit perfectly, a little to perfect so I trimed the fwd edge of the upper longerons a little more to eliminate a hard riding condition common to the firewall, there is now a 1/16" gap. Drilled the upper longeron to #40 c/t the side skins, engine fittings and firewall gusset.