Looking for a hill holder valve for my 1986 brat, any one know what years and cars will work and where to find, Heading to local wrecking yards. Would 1987 gl be the same or even have them on it. Thanks rayban1

Manual trans-4WD will have one. Not sure if the cables ends where they attache to the clutch fork are the same between EA81 and EA82 types.

If you are looking because yours is leaking, I would suggest just rebuilding it.  It's fairly simple.  I did a thread not too long ago on it, I just need to add part numbers for what I got in the thread.

I deleted the hill holder from my 88 RX, so that is available if it will work in your car