On TF trucks the 3100 (short bed) and 3200 (long bed) use different size brake lines, front hoses and front wheel cylinders. I believe the rear wheel cylinders and the hard line on the rear axle are the same for both though. I've been able to find both at Napa.
Oops! This may only apply 57-59 trucks and not to all TF trucks. Sorry about that. I see yours is a '56.