Is this the part you are looking for? I have a 2000 340. Be sure you get the screws that have the neck taper under the head of the screw. It allows the screw to stay in the track stop after you back the screw out. And not drop on the deck, bounce to who knows where.
I apologize for the ruler being off. I’m not that good with the small phone camera, holding the piece and camera steady. It measures 1 1/8 “ x 1 1/8 “ x 6 7/8”.
I hope this helps.