Looking to put a used JVC KD-G120R in my 71 Demon, Right now i have a $25 road gear casette player in the dash and chepo road gear 3 way 6x9's in the rear, i want to put the JVC under the dash so i'm guessing i'm going to need a install kit, also what would be a good set of speakers to use with this unit? I'm guessing even cheapo pioneer or infinitys would sound better than what i've got,output is 17w RMS x4. Thanks