I have been running a McCullough VS57 supercharger on a 340 horse 327 Chevy for about 5 years . In a
56 Studebaker Golden Hawk . The first thing I did was lower the compression to about 10 to 1 , I cut
the domes off the stock pistons to make them flat tops . Z28 hydraulic cam , I am using a highly modified
650 Holley double pumper in a blow thru application . The VS57 has a variable pulley . At normal speeds
it puts out about 2 lb pressure , it has a electronic kick down that opens the pulley and the pressure
goes to about 9 -10 pounds , this is adjustable . The fuel pressure problem was solved by using a stock
fuel pump and a electric pump set at 12 pounds . Under low pressure driving the stock pump gives it about 6
lbs of pressure , under high pressure the electric pump goes on with the electric kick down . A check valve
keeps the fuel from back feeding the electric pump and the stock pump phase one build in .
With a Muncie M21 and 4.56 gears it a fun ride .....
With a Paxton the box is the easiest way to go