1995 454 crate engine Build for 78 Nova coupe

I got a 95 454 4-bolt casting number 12550313 10230953 heads 10114156. I have a few questions. My first question is i have 73 v-belt pulley setup and water pump for it. I need the bolt sizes for

Crank pulley
Water Pump
alt brackets
Power Steering Bracket

Also I was wondering I bought hooker comp long tube headers, 40 series Flows, and the engine came with a team g intake and 750 double pumper. I was wondering if it would hit my 300hp mark? What would it take to get to 350-400hp?

http://img.photobucket.com/albums/v499/1970/hp1357.jpg
http://img.photobucket.com/albums/v4...0/000_0128.jpg