The VHF and UHF are already combined in the Winegard VHF/UHF Terminal Board Housing for CA/HD Antennas (CB-8269). You would need to use a UVSJ to separate them, which would have a loss of about 0.5 to 1.0 dB.
If you want access to the VHF and UHF sections before the combiner, it would be a custom modification.
