I did a intercooled magnacharger and it took me 20 hrs. Make sure you put new intake gaskets on. The chally I did had the intake soaked with oil and the rubber portion of the gaskets were falling apart. That was with a whole 5000 miles on it.

11.67@118 1.88 60' with only 7-8 lbs of boost. Turbocharged, megasquirted, 407 BB, 440 source heads, roller cam, 9:1 comp. http://s292.photobucket.com/albums/mm14/beansgracie