The 419’s use dual calipers on the front axles. Given your (presumably) lighter weight, you could drop one caliper from each side and hook to your existing master cylinder. The 419 is air assist hydraulic, not air brakes.
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website like our supporting vendors. Their ads help keep Steel Soldiers going. Please consider disabling your ad blockers for the site. Thanks!