bigger rear disc in rear than front a problem I assume?

I'm running into a dilemma, really bummed because I want to keep my 15" cop wheels for my 74 dart, but I am doing an HDK k member and need to order front brakes and it seems the only ones that will fit for sure are 11" front disc, and those will be smaller than the rear disc that are 11.2" on the explorer rear. I am not a brake guy, but it always seems rears are always smaller than the fronts. Is this going to be a major issue? I am trying to avoid 17" wheels as they never look right to me on the older muscle cars, too little sidewall. I also want the ride to be softer with the larger sidewall, this cars is going to be a street cruiser, nothing more.

so......will I be okay with the backwards disc sizes, or am I doomed to do the 12.19" front disc kit and go aftermarket 15's, or ?

Are you sure the 12.19" Wilwood kit won't fit your cop wheels?

Because the 12.19" Wilwood kit for the Mopar spindle lists a 15" wheel as the minimum.

Go back to rear drum. Stay Mopar. 10" & 11" available. A lot less problematic.
Brakes need air circulation, hence the need for larger wheels. Looks or performance. Just another choice to make.

Lol. The rear Explorer disks are not "more problematic" than a set of Mopar drums. Ridiculous.