disc caliper possibilities

[HeavyFuel]

I have stock discs on the front of my '68, and need to either rebuild those old 4-piston dinosaurs, or replace them with something.  It would be nice is somebody had an alternative out there to bolt in.  Doesn't seem like that big of a deal, they repop just about everything else.

I found this at master power brakes.  I sounds like the right thing, but I know there are just too many variable in those years that the caliper is supposed to fit, so I am a little skeptical.

http://www.mpbrakes.com/products/product-detail.cfm?product_id=658

Any thoughts?