Sell it to me for cheap!
Seriously, if you want real power, your looking to spend ~$3-$4k if you do the work yourself. I just build a 400 horse 360 for my '51 pickup, ran about $3,800 including the ignition.
Short of that, you can do some cheaper stuff that will add up. Edelbrock intake and carb, mild cam, MSD 6A box, blaster 2 coil and 8.5mm wires, open up the exhaust, etc.
The 360 has a ton of potential, it just takes some money to get it.