Wanted:. 1986 V6 harmonic balancer

[PK]

Does the brake booster port have a threaded bushing that screws into the plenum?

No.

[GTRS Fiero]

You have an engraved plenum, and there is not a bushing screwed in at the brake booster hose?

[PK]

So this was s a little embarrassing...

I took of the brake booster pipe from plenum to take a pic, then thought it would be neat to get the engraved plenum in the shot.  As the camera focused I realised my plenum isn't engraved .... My mind has somehow imprinted it as engraved.  Ooooops.

[GTRS Fiero]

Well, this answers a lot of questions about your engine.

[PK]

...... And my brain!!