[blykins]

The only head out of the ones that you mentioned that are for a big block are the SCJ heads, and comparatively speaking, they're nothing special.

Don't waste your money on a new block, just use a regular production block. They have plenty of room for stroker crankshafts and in stock form will hold 700-750hp. There's no need in spending thousands for a block when you can get one for $100.

As for the heads, the best bang for the buck are the Trick Flow Street heads for the 429/460. They flow about 350cfm right out of the box.

If you don't already have a stock rotating assembly (crank and rods) that you can use and you need to spend money on a new setup, just go ahead and spring for a stroker kit. The 4.300" kit is very popular and will net you around 520-530 cubic inches.

Getting 500-600hp out of a 460 is easy as pie, with just some good heads and a cam. When you start increasing stroke and displacement, you're adding the torque to go with it.

Now, you'll have to really quantify how much power you want, because when you say that you want the most power that you can get on pump gas, you're probably looking at 700-750hp.