86 3/4 brake line fitting at the perportioning valve

[VividVisions]

anyone know what size the fitting is coming out of the perportioning valve in the front??  i know that the brake line is 1/4 but when i took it off there is a different size in the front.  and i got all kinds of reducers, and i cant find one that works.  any help would be appreciated

[VividVisions]

never mind.  autozone let me go thru there "black cabinet"  not sure what size it is but i got one and it works.