it depends what year the heads are. 2000s got a round of extrude honing to the primary intake ports. you could probably get a couple hundred for them. personally i would go with the 3.0L heads since they have the bigger valves and bigger ports, but you have to do a bit of modifications for the waterpump, etc. you could get about $150-300 for the cams. also, for the lower and upper intake manifolds it depends again which year. 2000s had the biggest lower and upper intake manifold ports and 2000s had a dual honed upper intake. a new 2000 lower intake manifold with 19lb injectors and return fuel rail from spmotorsports is $219. A dual honed UIM is pretty hard to find. New your looking at about $400+ or so.
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"The CEG Nazi"
www.contour.org
1996 Ford Contour SE - Sold
3.0L V6 and Arizona Dyno Chip Turbo Kit
364 whp, 410 wtq @ 16 psi and only 4,700 rpms.
1999 Tropic Green SVT Contour - Bone stock and MINT