i am glad to have found this thread and forum, nice to meet ya, im Grum.
i have mounted my radios behind the rear drivers seat (2019 longhorn 4 door) im going to route the antenna wiring through the vents at the rear of the cab.
i mounted the antennas using brackets i fabricated to bolt in to the existing holes that the cargo tie downs are bolted to.
everything so far has mounted using existing holes. and i am not real keen on drilling new holes in the truck at this point.
problem i am currently having is figuring out where to put the head unit that keeps it out of the way, but makes it still usable while driving down the road.
i havent ran the coax to the antennas yet, but plan to enter into the bed at the hole in the top towards the front of the box on each side to prevent any cargo i carry
from damaging the coax. from there it will go to the bottom of the bed, and loop back up to enter the cab at the rear vents that are behind the seats. it looks like i will be able to push back a rubber flap to get the coax in, then seal around it so it doesnt lose its functionality.
the power wire, head unit control wire, and the speaker wire are ran under the carpet at the hump from the rear of the cab to under the center console where the speaker wire branches off,
and the power / head wires continue to the front area. the power wire goes all the way to the firewall where it makes a left under the carpet to a rubber grommet for the shifter cable is, and i pushed it out through that rubber seal.
the head unit wire comes up in front of the console and goes to the front where the head unit will sit on top of the wireless charging mat.
soon will have the coax, speaker, and power connected and will be back on the air!
update on the antennas performance...
the vhf/uhf performance surpasses my expectations! on the last ram, it was mounted on the side of the cross body tool box, bonded ground etc and on this installation it is inboard and just below bed rail . it actually out performs the previous install!! all radio equipment is same except the mounts and antenna locations.
it looks like the hf antenna works as good or better than the previous installation as well!
grum.