67 Dart GT brake options.... 13” wheels

I took my 67’ survivor Dart GT out today for a drive. 2 years ago I put all new wheel cylinders and full brake flush. Stopped like a champ. It’s been in my shop all summer even though it’s an AC car. Anyway, I’ve got another drum issue somewhere. Seeing that it’s super super clean and original... I really want to keep the 13” and hubcaps to boot. Before I start fabbing up my own caliper brackets, I wanted to ask. Was the disc brake option for 67 14” only? The older I get the more I absolutely despise drum brakes. Original or not, they are a dangerous pain in the ***.

I am fairly familiar with 1981-83 Mazda RX7 race cars. They had 13” wheels. You can get a 9.1” floating rotor and good pads and calipers pretty readily available. Guys Still race these cars in SCCA ITA class. So there’s a good aftermarket left with quality parts. Maybe a good little winter project.