What compresion should i have if i want to put a super charger on 351?

[RiCeFrYeR]

I have came to the conclusion that i am going with a 351. And i am going to try to get it to about 380 and then put a super charger on it. I am thinking that this should bring it to about 500hp. But i am thinking i sould not have more then about 9.5/1 or 10.0/1 compresion on the motor. I am looking at maybe buying the world man of war 351 making 380 in my summit magizine. And then with the supercharger.

But first i have to sell my truck. Anyone interested?
01 ford stepside reg cab.
71000 miles
great condition
Lowered 3/4 belltec drop
only owner, i bought it new
14,000.00 o.b.o
bizinthis@hotmail.com if need any pics or more info. I am located in the dfw area.