Windage Tray on 273 Question

and you can bend the tray until the pan drops on.
I have installed 340 trays on every 318 I have ever taken apart for personal use.
I used the 340 bolts.
As I recall;
I did not use any other parts than what came factory on the 340s, it was just a straight swap.

I do not know if the 273 maincaps are the same as 318 caps.