line lock orientation

so IF i got this right, you used something like this
Pack of 5. 1/8" Male NPT x 1/8" OD Tube Compression Fitting. | eBay

but of an unknown size?

does anyone know the OD of the stock brake lines on a 71 slant 6 duster with 9 inch drums all around?

(no, i dont have calipers, i know, i really should buy some)

More like this (actually exactly these)
3/16" High Pressure 5,000 Psi Black Steel Compression Union | eBay

Brass isn't recommended for brake lines, so these are 5,000 lb steel and one end without the nut on it threads right into the line lock body.
You will have to use thread sealer as the union isn't pipe thread but screws right into the pipe thread of the lock.

And 3/16 is correct on the stock line size.

I fit the bottom line first, then filled the lock with fluid and connected the top line so I didn't even have to bleed the brakes after the install.
I guess some people have to go through a lot of work before they feel they accomplished something.:D
This was super simple and works perfect without any extra fittings flares or line sections.
I simply cut the line and fed the two ends into the compression unions.
I also have brake lights when the lock is active, but didn't install any extra tubing, flare any lines, and no pressure switch.

Figure that one out. :D

lock.jpg