Trust me it's cramped, we've got in both our trucks, 1 x truck mounted GRN,VHF,UHF, 1 x GRN portable, 2 x VHF portables, and 4 x UHF portables.
But the UHF does come in extremely handy sometimes, we can liase with local council, SAAS and SAPOL with the CB as all have them on their local trucks/cars.