OK So I am wrong FMJ use front mount calipers but I can tell you for sure that I have done this numerous times on 67-69 B body cars where the front mount caliper interferes with the sway bar so using the spindles reversed so the caliper sits towards the rear with a banjo mount hose , but I have never used pin type calipers just sliders .
One of the main differences though is the Banjo type caliper has a lock tab beside where the hose connects to prevent it from twisting loose as Wild said so this is still not a good plan IMO , in 20 mins & you can swap the spindles over & use what you have