We have several mopar kits out there. We dont always get results back from our customers. But, one of our customers has a 340 dart that made 600 hp at 6.5#.
Here is the article
http://www.hotrod.com/articles/supercharged-small-block-1970-dodge-dart/

can these be intercooler? I see no reason why not, just wondering if they have done it.

Although some manufacturers claim a specific horsepower increase, superchargers actually add horsepower as a percentage gain (percentage of an atmosphere). Assuming an engine with a compression ratio of around 9:1 running pump gas,if a supercharger gives your engine 14.7 psi of boost (another atmosphere) that will essentially double the output of your engine, everything else being equal. After adjusting for thermal and mechanical energy transfer, if an efficient centrifugal supercharger is generating 7.5 psi (approx. 1/2 an atmosphere), you will see around a 35-40% gain in horsepower and torque at your non-supercharged maximum horsepower rpm. If detonation forces you to use an ignition/timing retard system, you will of course see less of a gain because backing off several degrees of timing will greatly reduce an engine's power output. At higher boost levels, the heat generated by compressing air will produce diminishing returns as the boost is increased, although the use of intercooling or racing fuel can avoid this scenario of diminishing returns. Assuming the use of intercooling to run higher boost levels while maintaining reliability, a 100% increase can generally be achieved at around 17 psi on an engine with 9:1 compression running pump gas.

Way too much of that written by the sales department.

"if a supercharger gives your engine 14.7 psi of boost (another atmosphere) that will essentially double the output of your engine"
This never happens.