The stock rallye hood on my challenger fits over my procharged 340 with a single plane intake. My throttle body is probably a bit shorter than your carb though.

-Jon

6382432-blown340.jpg (277 downloads)
70 challenger convertible. 340/5 speed. blown, intercooled, efi, blah blah blah 71 valiant scamp 318/A833OD/AC/PS 00 dakota RC 4.7L 5 spd autoX'r. SRT10/T56 swap in process 73 W200 Power wagon, PTO winch, 4 spd