i have a 671 dyers supercharger with 2 750 mighty demons for rectangular port big block chevy. I am wanting to get on with the motor build but dont know what i should get for a 454 block. Should i get a 2 or a 4 bolt 454 block. I am wanting to shoot for somewheres in the 650-700 horsepower range and of course want the thing to stay together. Are the 2 bolts able to be built to take that much power or do i definatly need a 4 bolt? I understand you can splay the 2 bolts but does that make it unfeasable enough to just say forget it and pay a little more and buy the 4 bolt to begin with?

Also, What is the difference in the normal deck height block and the tall deck. Will they both make good blower motors or is one better than the other? Do i need a certain intake?

Thanks