I'm doing a rear end swap (83w/disc into my 89 w/drum)and the issue of brake lines came up in another forum. Apparently the 83 is SAE flare while the 89 is an ISO flare.
Solution is to cut ISO flare off my 89's hardline and reflare it to SAE. Then just hook up the 83's rubber line.
Any problems with that, or is there something even easier?

 

Spohn carries lines for your earlier threaded car, buy a set from him...no flaring needed.

http://www.spohn.net/product.cfm?productid=1478

Ed

 

Thanks Ed, the problem is in hooking my 89 braking system to the 83 rear end, the fittings are different.

 

OH, easy solution: Buy new lines from Fine Lines or Inline tube for a '88 model car with J65 brakes, problem solved and you'd get new lines to boot. It'll run you around $35-40 shipped. I wouldn't mess with trying to hook up the older, standard thread lines. Too much hassle when a simple line swap will do it.

Ed

 

Thanks Ed,
I'm guessing you're talking about swapping the hard lines? I'm going even easier than that and having classic industries make me a new flexible line with metric on one end and SAE on the other for $30.