There are adaptor brackets for 5 1/4 speakers lfor the front. Ebay, and do a web search. They are available from a lot of places or they are not hard to make. 5 1/4 will sound a lot better than 4x6. (The front is the same for the 4 vs. 7)
2003 TJ, 33" BFG AT, 2" BL, 2" BDS spring lift, Truck Lite headlights, Homemade sunrider top.