I would recommend a sirio performer 5000 over the wilson 2000 or 5000. JMO, but I have had better results with the sirio performer 5000 vs the wilson 5000. Same radio and vehicle used. The sirio has better rx and tx characteristics as it is taller. The k40's are about bottom of the barrel IMO, used one and could not get it to tune worth a crap!! Same vehicle, same setup. The sirio outperformed both the k40 and the wilson 5000. These are just my results and JMO. I can't go the full 108" on an antenna as the van I drive is just too tall. But height is might and my antenna tip is right at 14ft with a sirio performer 5000. If I go any higher I am guaranteed to hit every overpass I go under lol. But seriously, check out the sirio antennas if that is the route you are looking to go, that or a predator 10k. If you can get the predator 10k with the proper mount from Breedlove for your Chevy truck, that would be the ticket, that or a 108" whip. JMO. Other than that, you can go with the sirio 5000 performer with the pl145 mag mount and put it dead center of the roof of the truck. As for the amp, 5.5 watts into a 2290 toshiba transistor is a bit much and will probably make the amp run hot, which in the end will decrease the life of the amp. Do I think the transistor can take it. Yes, does it mean it's right, maybe, maybe not. Texas star suggest a 4 watt dead key, and to me that is still too much to leave a good ratio of power. I would key the amp so that it has a 25-30 watt carrier. This will most likely require 1-2 watts of carrier from the radio. JMO. God bless.