Bleed both rear valves?

[VMAX NV]

Upgrading to SS lines, bled rear brake with outside bleeder valve. Do I need to bleed with the inside valve as well? I opened it up and nothing came out...

 

[bazwell]

Yes you do. If you can't get anything out, something is wrong.

 

[VMAX NV]

Why are there two valves on the rear caliper and only one(per caliper) on the front?

 

[bazwell]

The rear caliper is mounted in a different position causing an air lock when it is filled.

 

[VMAX NV]

Unscrewed the inside valve all the way, it was quite rusty. I assume rust was blocking the bleeding hole....need to replace.

 

[bazwell]

You can poke something down the hole in the caliper and see if you can get fluid moving.
It is likely that if there is rust blocking the hole, the caliper needs at least a strip and clean.
Brake fluid absorbs water, and rust is friends with water! So, if you can get fluid flowing out the bleeder, flush a lot of brake fluid through to get as much water and crap out that you can.

Make sure it is right!
FYI. You usually don't need any parts at all if you strip, clean and rebuild a caliper (Provided the pistons aren't rusty).