I need to replace the front rotors and pads, right now I'm assuming they are ATE, haven't had a chance to look yet. This is also a good time to replace the brake lines, re-pack the bearings, and rebuild brake pistons if needed. How do I tell if the pistons are seized, do I watch them while someone pushes the brake pedal or do I have to take them off and look at them? Anything else I should do at this time?

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1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k