If you have the side windows rolled up, some bungee straps or a ratchet straps will hold.
Just loop em over the board and under the side roll bars.
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.