Speedometer and headers....

[XenocideZero]

I'm considering buying a Gen.4 Civic HB, but the speedometer isn't connected and I need to change the header on it. I have (don't ask why) a spare header lying around so getting the replacement one isn't a problem.
My questions for anyone who would be kind enough to help me are, how hard is it to hook up a speedometer and change a header, and if you know how, how to install both.

Thanks
XenocideZero
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[K2e2vin]

speedometer is easy, just put the vss/gear assembly in the transmission and bolt it down with the 1 bolt(accessable from the top of the engine bay; just remove the intake arm), and in the back of the gauge cluster it just clips in. The header is easy except for the bolts that hold the secondary to the engine and bolts to the catatlytic converter. I busted my knuckles loosening those.