So I am plumbing my brakes today. And I decided I was not sure which port went to what end of the truck. I am using the 69-70ish chevy master number 13-1331. Pushing fluid to a chevy disc dana 60 front and a dodge dana 70 rear with 13 inch drum brakes. So I check a couple dead FSJ's in the yard. Rear port to front brakes. My CJ rear port to rear brakes. The master cylinder has front cast into the front port. The brakes work flawlessly.

I search google... And I found this.

If the reservoirs are the same size, a good rule of thumb is that the front reservoir feeds the front brakes with GM master cylinders, while the rear reservoir feeds the front brakes on Ford and Mopar master cylinders.

So according to this statement (I read it on the internet!) The picture of Warthogs first post showing the brake lines from the master is wrong. He has the rear port to the front, front port to the back.

Does anyone know the accurate answer to this? Same size reservoirs front and back on the 13-1331. So far I am leaning towards front port to front brakes. This would be a good thing to clarify.

Anybody have a 68-70 chevy truck to check?