[mrnickleye]

Since you did not bleed the new master on the workbench, you likely SENT a bunch of air into the lines.

KEEP The Master full of fluid !!!

First, get a friend to help (sit in car and press brake pedal up and down on your command), and your wrench on the 2 lines coming out of the master. Have friend pump pedal 3-4x then hold it down. Crack open the lines. The pedal will fall, and fluid and air will come out, tighten lines, then say "up" to friend.
Do this 4-5x or more until air does not spit out at the lines you are bleeding.

Tighten lines, firm but don't overtighten.

Now that your master is bled, go to the right rear caliper and do the above steps ("down....up) until only fluid comes out. I like to attach a 12-18" piece of vacuum line to the bleeder screw, then into a coke bottle to keep the mess down, and I can see into the bottle when the bubbles stop.

Also, you can buy a one man brake bleeding kit at a parts store. It has a gun type vacuum pump to suck the fluid from the master to the caliper.

Keep master full !!!

Next do the left rear. Then the right front, and finally the left front. This order is the correct way.

Then report back to let us know how it turns out.