sbp front disc swap for 73 dart w/ 10" drums

I'm looking to do a front disc conversion on my 73 Dart with 10" front drums. I want to maintain the sbp because I only want to swap the brakes and not the rear axle, wheels etc. I really like the 14' tire, white wall and wheel cover look and can't be bothered with the expense and hassle of swapping the axle and wheels. All the kits I see are for 72 and down. What are my options?

Thanks