1 ) Head $125
2 ) Head gasket $15
3 ) Chunk of aluminum - free
4 ) Welding and Machine work $500ish
5 ) Cossie intake $150 (I think... right, Erik?)
6 ) Custom exhaust [manifold] $100ish in weld els, plus $60ish for the flange, plus whatever welding wire I used
7 ) Holset turbo - basically free (traded my stock turbo and forgave debt on parts car's engine to Nick with the Ranger)
8 ) Waste-gate $75
9 ) BOV - free (my buddy Paul gave me this in exchange for allowing him to store/modify his 240 in the shop)
10) Engine management $300ish
11) Serpentine belt $20ish
12) Radiator $80
13) Intercooler $50
14) Misc. Parts $1 Billion (?) muahahhaah
15) Time...Priceless
There, I modified Mike's list with my costs on stuff (as far as I can recall). Of course, that's just brushing the surface. I didn't include prices of experimental items which didn't get re-used on the "final" product... such as the V2.2 megasquirt board, the 1.5" mandrel J-bends for my initial header, the weaksauce radiator I initially had, etc... Then, there's all the miscellaneous equipment not on the list - catch can, expansion tank, all the hoses, braided lines and AN fittings (probably about $300 total), the exhaust itself (I bought a Cummins downpipe just for the ball flange

), big injectors and a Walbro pump, adjustable FPR, a transmission and diff capable of dealing with the power, etc...
Basically... there's more than one way to skin a cat. If you're an experienced cat-skinner, you can probably do the job a lot more efficiently than I did. It took me a few tries before I got a well-extracted kitty pelt.
Colin