For 12" brakes you will have to specify for non-Henschen axles. And it may be difficult to get the vendor on line with the 12" brakes. For Henschen axles it will come equipped with 12" brakes. Like it was stated above, supplying the VIN for your trailer and that is all you will need for an axle order.
It is my understanding that pre-1970 something these is no drop in axle of any manufacturer. Henschen will be the closest, however expect some not much modifications to make it the same as originally equipped.
1966 Mercury Park Lane 4 DR Breezeway 410 4V, C-6, 2.80 - Streamless.
1966 Lincoln 4 door Convertible 462 4V 1971 Ford LTD Convertible 429 4V Phoenix ~ Yeah it's hot however it's a dry heat!