Heater Flapper Box Question Options

[curt914]

Hi Folks

I'm getting ready to put all the heating stuff back into my ‘73 2.0. Got a box full of this stuff.

But first, I’m going to get the J tubes, heater control valves (aka flapper boxes) and other metal tubes and bits powder coated.

Here’s the thing though. In this box of stuff, I have three heater control valves, two of which are in pretty good shape.

But it seems there is a difference in left to right heater control valves.

Both Pelican and AA have different numbers for the left to right.

With them sitting on the bench I don’t see any difference in any of them. That may mean the ones I'm looking at on the bench are all from one side.

So .. what’s the difference between them…left to right.

Thanks much.

Curt