Cheapest way to built a 300-350hp small block

Go get a running 5.9L Magnum from a wrecking yard...

Order a cam: http://chucker54.stores.yahoo.net/smblmahycamo.html

An intake: http://chucker54.stores.yahoo.net/rpmaima551rp.html

A carb: http://chucker54.stores.yahoo.net/750cfmfobast2.html

A distributor: http://chucker54.stores.yahoo.net/ma27331834032.html

And Bobs your uncle, a 300-350 HP small block.

You'll also need an oil pan, water pump, brackets/pulleys, electric fuel pump and headers to match your chassis.