I've been trying for a week to hook up a 76 distribution block to a 76 master cylinder and put them in my 67 A-body. After several trips to my local unspectacular parts stores, I had almost enough cobbled together cr*p to install. The lengths were too long, and I still needed one more adapter to go from 3/16ths IFM to 9/16ths IFF in the distribution block. That's when I decided, "what the hell? I'll just get the correct lines for a 76 from inline tube in stainless, and not have a bunch of adapters and pieced-together stuff.
I just got the lines, and they are too long, have loops in them, which seems to me to be a way to trap air, and still require the same 9/16ths adapter to attach to the stock block. The tech guy on the phone was one of these young, smart people who seemed to have little or no interest in making sure I got the right thing. He was more about not being able to guarantee it would work.
Rather than send it back, I'm off to more parts stores to look for an adapter, so I can get this thing put together. I write this to rant, but also to advise anyone trying to do this swap not to try getting the stock 76 lines. They don't exactly fit.

Try Fine Lines...for the money, all the lines fit perfectly and snapped right in place on the body for the main lines and all the connections to the prop block made it easy to connect and go.

-D.Idiot

I will DI. I was just thinking I could have bought a high quality flaring tool by now. Education always costs $.

Those loops are there for a good reason: to provide flex in the lines from the master cylinder to the prop valve, so they can easily be installed and can withstand vibration without work-hardening and becoming brittle.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I had thought that, but then when I put one in a line, a diesel mechanic told me it could create an air dam. Keeping an open mind, I would be willing to accept that there's a reason for them being there. There usually is. Plus this friend is a Vietnam vet Navy SEAL, who may be a little off the money at times. Sorry Inline Tube.
They had restocked the brake adapter at the local place, so I have the adapter. Also, I bought six basil plants from a tall, beautiful farm girl on the walk back from the store.