balls to the walls 400 build

I have a 400/727 with about 68000 miles on them (bone stock) sitting in my shop. What would it take to build a 451 or something just as nasty the cheapest way possible using dirt cheap or stock parts and very low cost catalog parts. I can get any size cam made up for pretty cheap from a local cam shop and I have this other problem, I like tunnel rams and weird carb set ups (think 80's).
This motor is going into a 27 T rat rod with a 8 inch chop, narrowed 8 3/4 rear, cage, zoomies, and a suicide perched streight axle. I want to scare the holy crap out of people just by starting it. I dont care about gas mileage with this thing and it will be just barley street legal. This is a very cheap build and it's the kind that if the motor goes kaboom who cares I'll do a cheap rebuild or slap something else in it. Just remember cheap!!!
This car wont get put togeather untill my 53 pick up is on the road and I need some motivation to get it done!