You can definitely make this work. This is how I would do it:
I'd get two separate monoblock amps for each sub.
Each sub would have its own enclosure box.
You can give each sub the correct wattage it requires to run safely at the RMS rating and Impedance.
It would be good to know if they are Single-Voice-Coil or Double-Voice-Coil. I would then go to sonicelectronix.com to see wiring guides.
Run a single wire from your battery to a power distribution block. Distribution block must be in between both amps. Then have two wires powering the amps.
You can get another distribution block for ground or just ground the two wires from into the sanded, non-painted surface on the chasis.
Now the trick would be to have your RCA cables go from a single to double output. I'd plug my RCA to my Headunit/Equalizer and run it to the amps, then split it into two.
Obtain a Digital Multi-Meter to measure your final impedance of your subs, meaning once you wire them, get the correct impedance for the proper RMS wattage needed to run your subs ideally.
Finally, since you have two different amps and subs, you have to tune the amps gain so you don't get distortion.
Use this website, http://sparky3489.webs.com/amplifiergain.htm
, to match your final impedance of your subs and the RMS Wattage. For example, once you wire your sub, you may end up with 1 ohm impedance with 300 RMS Wattage. At the cross section of the chart in the link I provided, make note of the Voltage. Follow the steps in the link and adjust your gain for optimum output from your subs. Basically what you are doing is adjusting the gain/sensitivity to get close to distortion/clipping level, where your sine wave starts to square off at the peaks, and turn the knob one step below where clipping occurs. You can tell by ear where distortion occurs. When the 60Hz tune is playing in your subs ONLY, you will hear a hum and as you increase the gain, the hum will change pitch and start to buzz. Buzzing means you are in distortion field. Step it down a notch and get back to the hum. The buzz comes when you surpass the indicated voltage value in the link I've provided.
If you've got any questions feel free to PM me.