I see displacement more as a powerband selecter, your gonna use a powerband of around 2500-3000 rpm from stall to shift points in a drag race. The 434 powerband probaby will operate about 300 rpm less then 408 which is about 400-600 less than a 360. Which depends on what's done to the heads you might make peak hp mid/high 4000 rpms so Eg.. a 2500-5000 to 2800 - 5300 rpm stall to shift.
Good thing it's gonna be strongest at all street rpms and probably only need highway gears, bad thing power is gonna drop off rapidly after peak hp.
3.55 28" tires @ 110 mphs = 4686 rpms