Brake pedal is really stiff

I've blown all the lines out but I didn't take the distribution block out and mess with that yet.

The MC is 1" bore. I've checked that already.

The wheel cylinders I put in it are

Raybestos WC34876 in the back
Raybestos WC37102 and 03 in the front.

When I bought them I went on RockAuto and got the 9" brake wheel cylinders but they don't say what the bore size is. I've tried researching it and the only info I've found is ebay says the fronts are 1" bore and the rears are 7/8" but I don't know if I trust that. Does anyone know what bore size these cylinders are?