As posted, the relay's help a lot. The fender relay is a handy place to pull the power on a MOPAR. Upgraded halogen headlights + bulbs help a lot also. The two together made a huge difference on my F250. I used LMC stuff... which is also offered for Dodge. If you get the harness kit you will also need fuses or circuit breakers from the parts store.

http://www.lmctruck.com/icatalog/dc/full.aspx?Page=33