Master Cylinder and Bore Size

[69TAPoser]

My 1st Gen FB will have Dynalite Pros 10.75 brakes on the front and rear. I have decided to go with manual brakes and a Wilwood tandem chamber master cylinder. I spoke with Wilwood, and they recommend a 7/8" master and using the lower hole on the brake pedal.

I just wanted to make sure that this is correct? Also, I assume that a prop valve should be used?

Thanks,

Phil