can pat#350.432 ( 1985 pat#) # on arm40754

I'm afraid I can't say for sure what you have without a photo. The provided codes are sometimes related to the truth brand 39-031 and 39-032, but that's far from a guarantee.

Your next step should be to look over the design and arm dimensions for the abovementioned parts to verify that they match. If they don't, we will need clear photos of the original hardware in order to find a better alternative.

Dimensions for 39-031