66 10" original style front brakes pulling

I replaced master cylinder, 4 wheel cylinders, lines, hoses and front shoes.
Everything bleeds right and all shoes are adjusted. After driving 500 miles the brakes have always pulled hard to the left. I can lock up all wheels except the front right.

Tried:
re-bleeding and readjusting- twice.
inspecting front shoes for contamination -- none
reversing lead shoe on the right (no real reason just cant think of anything else).
using search and trying to compare pulling brakes with others who have troubleshot this one.

Looking at the wheel cylinders I got from Napa they are identical. But the picture on their website shows that there is really a left and right. The difference is where the brake line exits. The L & R Napa castings are the same.
Right now the left line line exits forward and the right line exits rear. From the Napa online pictures it looks like both should exit forward. Is this how your 10" brakes are set up?

http://www.napaonline.com/Search/Re...der&Ntk=Keyword&N=599001+101967+50045+2045003

Is there really a difference between left and right wheel cylinders?
Any other reasons why the right front wheel has no stopping power?

 

Make sure there is no grease/oil/brake fluid on the shoes and drum.

 

There really is a different right and left wheel cylinder. Sounds like yours may have been mis-boxed. Could be the I.D. could be different as well if everything else is ok. The I.D. determines how much force is applied to the brakes. If smaller on one side you would have different braking on one side vs. the other.

 

If your left rear wheel is locking and not the right rear, it will swing the front to the left quite radically even though both fronts are working and adjusted properly. Although the front wheel cylinders are designed for one=L and one=R, as long as they are the same inside diameter it shouldn't mater. The only diff being how the "S" line goes in and the bleeder screw placement. The internal workings are identical front to back.