standing rigging diameter?

[county]

My boat a Mao Ta 36' had 5/16 cable on the very heavy wooden mast with antiquated external Forespar furling main unit.

The new to me aluminum mast came with almost new 9/32 cable, its seems to me that a reduction of 0.032 in diameter would be acceptable considering the substantial loss of weight aloft.

or maybe I'm being foolish?

The boat #s are

L.O.A. 36'2"
L.W.L. 32'6"
Beam 11'2"
Displacement 28,000#
E=15'7"
P=39'
I=43'5"
J=18'8"

The boat is a full keeled cutter rigged Mao-Ta 36 if you are not familiar with the model it is nearly identical to the Union 36 or Hans Christian 36

Any thoughts?
Thanks.