Trying to identify brakes

Jimacuda said

caliper looks like a 73-74 B body, 2 pin
there is a caliper or two available with the correct hose location for A bodies...I dont remember but someone will...
had the exact same issue on initial build of my demon
I changed to slider calipers because I had them and the brackets available

Click to expand...

Ya that's a 73 up B body pin type caliper.
If you stay with the pin type, you need 70-74 E body calipers. (70-72 B are the same, too)
If you have the calipers mounted towards the Front, the B & E body flex hoses work.
If you have calipers towards the Rear, i can't give you a hose recommendation, as i don't know, what they use for rear mounted calipers.
Good luck.