Front brake line replacement questions

[ih8vols]

I have a 79 Silverado Stepside. I've been having issues with it pulling to the left pretty hard when braking. Since it's winter, I've decided to replace all the front brake lines. I ordered replacement pre-bent steel lines from  .

Couple questions:

• The steel lines don't line up to the old ones exactly. In order to secure it to the frame, I'm going to need to bend them some (I have a tube bender). Is there any issues with brake lines having a 90 degree bend or is that a bad idea?
• How do you bleed brakes on these trucks since it has the proportioning valve? I bought one of the aluminum overrides. Do I use the override, bleed the brakes and replace the override with the valve when done? Will that introduce air back into the lines?

Thanks!

[zieg85]

I hope you are replacing the rubber lines as well.  As long as the steel lines are not crimped 90 degree bend will not hinder anything.

[ih8vols]

Oh yea, the rubber lines were my #1 target. Just decided to do it all since I was already there. Appreciate the response!