Here is a brand new 331 stoker, never fired, forged everything, girdle, windage tray, cam, timing chain, ready for boost or nitrous. You can probably get it for less than $2000.
http://www.stangbangerz.com/forums/showthread.php?t=75161
Here is a set of AFR 185's you can probably have for less than $1000.
http://www.stangbangerz.com/forums/showthread.php?t=75326
OR, just get a stock 302 and boost or spray the fuck out of it. You can put a set of nice heads and a nice cam on a stock 302, intake, carb and a 150-200 shot and be at about 450 RWHP for less than $2000.