Depends. bigger rigs can sometimes run more power, but its sometimes a case of all mouth no ears.
Start with that and see how you go.
I run these at the moment :
Not quite a CB... but does 27/81 frequencies (the same your CB does) after programming.
hope you do not operate on this frequency with no ham licence
(and theres nobody there lol!)
OH yes there is !!
When I get another vehicle sorted and I'm back on air I guarantee you'll hear me cos I regularly go sit at about 1000ft ASL to play radio.