sounds like your talking about the valve lash.
re-read what it says. its not 1-1/2 turns after they are tight, it is 1-1/2 turns after you reach zero lash. and some people will say this is to much also. theres also directions on which ones to adjust and when to adjust them. some people will go as little as a 1/2 turn, most people are around 3/4 to 1 turn, and some go the full 1-1/2. fortunatly, thats the whole point of hydraulic lifters, is they take up the slack. I personally like 1 turn after zero lash. it all depends on how accuratly you can find zero lash.
good luck
edit: dont forget to put the intake manifold gasket in BEFORE you lash the valves
[This message has been edited by Pyrthian (edited 01-16-2004).]
