Depends on how much other gear I can offload! Check out Parts for sale.
The price was $1450, not mega cheap but, when you consider
1, how hard they are to find
2, improvements over standard zetec like,
stronger rods,
better flowing re cast head
bigger intake valves
stiffer springs
more radical cam profile
higher redline
better torque curve due VCT
intake manifold ready for Quads.
I think you'd be hard pressed to build a zetec for the money with the same spec or performance.