What master cyl do I need???

1951 Chevy 3/4 ton upgrading to SBC, 700R4 tranny, and disc/disc brakes
Those of us that want to upgrade our brakes might want to upgrade our master cyl. Some might want to use a firewall mount and others a frame mount. My preference is to keep the MC on the frame so as to keep the firewall as clean as possible. My dilemma is which MC to use. Both products I am considering use the existing mounting holds in the frame however one comes with its own brake petal, the other uses the original petal. My first inclination is to use the MC that uses my original petal but there may be advantages in the new petal I am unaware of. The links to the vendors are below:

This one is sold by Classic Performance Products. This MC will bolt up where the original bolted and uses the original brake pedal.

Which is it?
This MC: for $325.00 (a quality vendor & uses original petal)
http://www.classicperform.com/Store/...ks/4754BBD.htm

Or this MC on eBay for $289.00: (could be dubious) Comes with the petal. http://cgi.ebay.com/ebaymotors/aw-cg...tem=8070438854

Or this MC from TCI for $415.00: (a quality vendor petal comes with it)
http://www.totalcostinvolved.com/pro...cfm?prodID=291

Any suggestions will be appreciated

IMO, i would use the original. If everything all bolts up to the same place. Whats a different pedal gonna do? maybe make it look shiney. I think imo, you'll be fine with the stocker. thats what id do. maybe erik, or denny might have better input on this one :D