Front brakes 4x4 3/4 ton PLEASE HELP

[72_Chev_Truck]

I am currently trying to find wheel cylinders for the front of my 1970 chevy truck. It is a 3/4 ton 4 wheel drive. supposedly there are 2 different brake sizes for these trucks. I measured the friction material length at 11 and 13/16 inches. My problem is every wheel cylinder available that i have found is wrong. the cylinders have a larger opening for an extension fitting for banjo type connections. this extension i assume gets the hose out of the way of all the steering. please shed some light on this situation for me. i need to get this truck fixed as soon as i can. thanks