Originally Posted by
Spyderjohn
Thought I'd see who wanted to weigh in on this... I'm upgrading my 66' 352 slick to power steering and in doing that will be installing the double belt crank pulley.
Of course the two belt pulley that I have is a three bolt and the original was a 4 bolt.
(and my pulley is just back from powder coat so I think I'll keep it.)
Look on the balancer you have now, post the stamped ID number from it..to determine if it's the original or from a 1968/76.
Sooo.... I will need to replace the original harmonic balancer.
You cannot and you do not need to!
Qwist on a bicycle! You are making a mountain out of an ant hill!
The harmonic balancer you use
MUST match the flywheel or there will be a vibration that will eventually tear the center from it. I kid you not!
Where on earth will you find the CORRECT FE harmonic balancer that matches your engine that has a two sheave pulley made as part of it...since there's no such thing.
C3AZ-6312-E (replaced COAE-6312-B) .. 1960/67 352/390/410/428 Harmonic Balancer-Includes a single sheave pulley / Marked:
C4AE-6316-A or
C4AE-6316-B
This is so simple a cave man can do it. All you have to do is bolt an ACCESSORY OUTER pulley to your present harmonic balancer. This is correct FoMoCo procedure.
Since it already has one sheave pulley, you will either need a single or double sheave outer pulley. BUT, first...what you need to find out is...if your present balancer is the original, or from a 1968/76.
I'm not sure if the C3AZ-6312-E balancer has three or four holes to mount accessory outer pulleys.
Nor can I recall how many holes D5TZ-6316-A (replaced C8AZ-6316-A & D2TZ-6316-A) 1968/76 360/390 balancer has.
But...I think 1960/67 has THREE holes, 1968/76 has FOUR, but like I said, I'm not sure and haven't seen any since the 1980's.