Double Din Radio Install in a 2005 Jeep Grand Cherokee Bypassing Amplifier

Install a double din head unit in a 2005 jeep grand cherokee for UNDER $60.00 !!!! and bypass amplifier.
Double Din head unit : amazon KUMK
Dash kit : amazon Metra 99-6510
Antenna adapter : amazon Metra 40-cr10
Wiring for radio: google search wiring diagram for 2005 jeep grandcherokee with navigation ( a bit confusing is most will show with 8 speaker wires. amplifier uses only 4)
Wiring for amplifier : google search apmlifier diagram for 2005 jeep grandcherokee