warped brake roters

I see your in Canada. Getting stock parts is often a problem. They are usually a much better quality that replacement. What I think you should do is go to NAPA or other supply and ask for the top of the line rotors, pads, calipers and flex lines for the front. Don't bother turning rotors, they will be to thin and warp, they just won't have the heat capacity for the front of your rig. Also, if I were you, I would do the same, full kit on the back, new pads, rear drums, internal brake parts kit including the star wheels. These parts don't last forever and a big part of fronts is the caliper slide pins and sticking which causes big uneven wear and warping. In the drums on the back, same thing holds true, poor adjustments, means you are pushing the pedal a long way. Once this is all done, bleed all the old fluid out, new fluid with no water in it doesn't boil as easy and is going to perform much better. Finally, you have a hydro boost, replace the fluid in it, suck out the tank, place in new, jack up front and cycle wheels side to side, suck out the fluid again, replace with new fluid(mercon transmission fluid, it also runs the power steering right?) Do this several times. This is all very important, your hydro boost is telling you it's not happy, you should not have to push so hard, the hydro boost is used on F250, F350 diesels for many years, and is still used today. Make sure this is all working properly, I am thinking this all needs to be done right so you can get the full performance of the braking system back.