2nd Gen brake question

I'm upgrading the "single" master cylinder in my 1st Gen to a "dual" from a 2nd Gen. I want to know which of the lines coming out of the master cylinder goes to the front brakes. I'm assuming it is the front one, because it has bigger threads.

Do your front brakes use a bigger steel line too? All mine were 3/16" at the wheels so I'm just going to run that size line all the way.

VANagain these are some shots of my 68 parts van. The front brakes are fed from the rear reservoir on the master cyl. The two small lines leaving the junction block go to each of the front wheels and the larger line goes to the rear of the van. The junction block must be partitioned in the center because it's fed from each end by the two reservoirs of the master cyl.

Thanks for the speedy response! I'm going to skip the junction block. Never had a brake light before on, don't need one now, I guess. I assume there is no pressure regulation going on in this junction block, it just watches for an imbalance from a leak.

Now I've got a question for you 1st Gen owners. Which way does the brass adapter go on the front brakes? Does the flexline connect above or below the hollow banjo bolt? My shop manual seems to show it above, but it seems odd to have the line going up that way.



But, notice that my new brake lines have an elongated metal connector on that end, which makes it stick out further. I had hoped this meant I could leave out the brass adapter and just screw the flex line directly into the wheel cylinder. But I couldn't get it to screw into it, even though the threads looked the same. Have you guys ran into this? How did you handle it?

Thanks,

I'll dig for the receipt, should be able to provide the part numbers too..