get your self a workshop manual
its a fairly simple job,but could be easily done wrong!
it is easier to put the manifolds on first, but its personnal preferecnce really,
timing is quite simple, two cam shafts mark up with each other, tdc on the cossie is the far side of the lump on the bottom pulley next to the groove...dont time it up on the groove though! and the dizzy needs to have the rotor arm aligned with the marks on the dizzy casing.
this is all very very basic, get your self a manual and go from there.