that NMO-27B would look good.
I've been running the NMO-27 off and on for nearing 30 years. You won't find a higher quality antenna. It's not hobby/cb grade junk.
On the police Interceptors Camaro they put the antenna on the trunk but in the rear just in front of the spoiler. that way they can open the trunk.
If that works, that works. You may have someone tell you that it 'must' be in the center of the vehicle to make use of the full ground plane potential the vehicle can offer. That would mean the NMO mount dead center of the roof.
That's probably not what you want to do, although it would work a bit better. Truth is, on a passenger car, you'll never have enough metal under the antenna to be a 'perfect' ground plane. The car just isn't big enough. So, we do the best we can. Mounting it there on the trunk will make it slightly directional towards the front of the vehicle, but it'll work just fine.
Just be sure the trunk lid is metal, and not composite, plastic, etc.
I could cut a hole in the trunk lid. The trunk lid is easily replaced if i ever sell the car.
Or, put a NMO cap on there. Or, replace the NMO-27 with a NMO base cell antenna and tell the new owner it works great for coverage. Truth is, a properly installed NMO mount will not impact trade in value.
I think i will go that route. thanks. Should i do a RF filter? I have a Snake Radio Customs Uniden 980SSB with a RM203 and Wilson 5000 roof mount in my 17 Silverado. I dont notice any noise with the truck running or off. Doesnt even interfere with the XM.
A properly installed CB with properly installed and tuned antenna shouldn't need filters. It's usually poor installation that causes issues.
Power for the radio and the amplifier need to come straight off the battery. Ground the negative leads to the vehicle chassis, NOT the negative terminal of the battery.
Ground the radio chassis and amp chassis direct to the vehicle body with as short a strap as you can use. Do not rely on the negative power lead or the coax shield for your ground.
Route power wiring away from other vehicle wiring by several inches. Cross other wiring bundles at 90º angles.
Same with the coaxial cable, keep it well away from other vehicle wiring.
Make sure your antenna is properly tuned.
I've never needed to run any sort of power filtering on any radios I've installed. Never needed one on a CB, but I've never run an amplifier. While there are rare applications where one might be needed, most of the issues can be solved with proper install techniques. Too many want to rush the install and cut corners. That leads to issues.