[jeffahart]

Here is a clip from my 1970 K20 to 1ton axle swap thread.

"on the driver side there is an inline T in the frame rail. It is one of those crazy ones with the banjo bolt. So what happens is the banjo bolt bottoms out in the adapter before pressure is put on the copper washers. I got fatter copper washers and there was very little thread left for tightening. I went for it anyway, it leaked. I tightened more and it stripped, luckily the adapter stripped not the bolt. So I stacked the original brake line on the ORD line with the adapter. So it's drivable. I need to get rid of the old T and get a new one."

So you can see I got an interim solution by stacking brake lines with an adapter. I put in a proper T a couple weeks later. That old school banjo T is the pits!

I now have my truck in the garage and am converting to hydroboost.