I only run the two pulleis and to tell you the truth I don't see any difference than with all three (performance wise) You still will pick up a bit with only two and won't have the charging problems. Some people say you have to have all three to get the gains, but there is definately a gain with only two.
------------------
1991 GT
5.0L 5spd
Mesa, AZ
visit
cw50must's web site