You could start by carefully adjusting the bends, then replace the fittings on the new lines with the correct ones for your existing valve. I would assume that as long as you have a decent master cylinder and a distribution valve it should work. I have recently learned that there is a hold off valve for the back brakes on later models with 4 wheel disc brakes. In lieu of that adding a proportioning valve would also give you the opportunity to fine tune the system if you have to. I know it is a pain to change them but what I also always do; is make sure that the master cylinder has the word "disc" somewhere in the description when converting to disc brakes as well. I'm sure it is better to have more than less, so when it comes to brakes, I think its the only time that wearing a belt and suspenders makes sense.