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Depending on the actual conditions at your exact location, the Antennacraft Y10713 may be a better choice for receiving real channels 7 through 13.
It's very doubtful that two amplifiers are need. An Antennas Direct 'Juice' or an RCA TVPRAMP1R would be my choice... One or the other, not both. The LAN-200 lacks shielding which makes it prone to acting as a poor quality antenna, which can open you to symptoms of multipath interference.
The CC-7870 has no band separation filters. It's nothing more than a splitter labeled for reversed signal flow. The UHF/VHF inputs of the RCA preamp or a stand-alone UHF/VHF combiner will provide far better isolation between the two antennas.
Three feet of distance between the antennas is minimum. It's prudent to test reception before drilling holes and cutting wire to length.