Review on Specialty Harmonic Balancer 1955 2004 Chevrolet Replacement Parts by Joe Bailey

I installed it on a zz4 sbc 350 in my '88 Chevy truck, you need to pull out the center harmonic balancer bolt as well as 3 pulley bolts. The OT -Marking on the cover perfectly matches the original balance mark. It also has 90 degree marks for adjusting my roller rocker arms using the 90 degree method. No unwanted contact with the timing cover or the water pump is even close. Very good Detailing.The pointer does not cover the degree markings as some say.Get black markings easy to see.