Its Sunday but I could not resis this ... With those clamp-on saddles, you have to be very careful about applying torque to the saddle above the valve. Twisting that connection might bend the puncture point and produce a leak.
You will, of course, shut off the water before starting. You will, of course, drain the system so you don't get a bath when trying to do your work.
Pre-size your two wrenches so you can work quickly. Assuming you DO NOT want to keep the old valves, you can apply heat directly to the outside of the threaded portion. You do not have to heat it until it glows! Just apply 25-30 seconds of heat around the fitting. Set the wrenches and pull steadily ... The old pipe dope will give way easily.
Let the fittings cool ... sometimes a wet rag can speed the process and a cold beer. Apply fresh pipe dope to the threads of the new valves, making sure the red valve is on the hot side (no, duh?). Turn it by hand until it starts to grab. Reapply your wrenches and turn smoothly to get the outlet in the proper orientation ... remembering NOT to allow torque on the saddle fitting as best you can. You are NOT strong enough to strip the threads, so be as muscular as you need to be.
Attach your spanking new braided laundry supply lines. Turn water back on an marvel at the fact there are no leaks.
Get the spouse and say boldly: "TAH DAH!" Collect congratulations and kisses.