let me make it a little more simple for ya,
1-sohc non-vtec
2-sohc with vtec
3-dohc non-vtec
i would recomend the dohc zc and a 50 shot of nos,it would be cheaper than any b-series,and way faster stock for stock,but its all in what you have to spend.my buddy had a 92 civic with a 75 shot on a stock dohc zc ruunning low 13's =less than a 1.000.00 spent