x3....and Yes, the 750dp will work, but you might be leaving some power on the table...might being the operative word...hard to say. My 410 has a 750dp on it and does just fine...but more than a few folks have told me that my car appears to be the exception to the rule, so take what you want from that.
For a 50/50 street/strip car I would go with the Airgap. I have had both the Victor and the Airgap on my stroker, the Airgap with a 1/2" open wood spacer + a 1" tapered spacer had the best throttle response and best torque (better for street driving). My car is more like 90/10 Race/street, so I currently run a Victor intake.