Cobra Brake upgrade. Which Master Cylinder? 94 or 04?

I'm about to purchase the Cobra Brake upgrade kit for front and rear from Performance Parts Inc. My kit will have the red calipers which are listed as the 10th Anniversary Cobra kits. Which master cylinder should I get?

A local Ford dealer has a decent price for a 1994 Cobra master cylinder, but not sure if that will be OK or if I should get a 2004 Cobra master cylinder. Part numbers for both are different.

Who has upgraded to a Cobra master cylinder AND which did you get? Where was it purchased?

Thanks.

Thank you so much. Your post looks familiar, but I swear I didn't see the answer.

A local Ford dealer can get me a new m/c in a couple days, so I'd like to get it since everthing else is new: front/rear kit and ss lines. Also adding 03 Cobra front control arms while where at it.

Thanks again. Now I'm gonna order everthing tonight.