8 inch Balancer 3870325
 

What is this 0325 for exactly? Lotsa differing info on the above, e.g. COPO / Spec Hi Perf. / 1965 - 68 Chev / 1965 - 1969 Vette ?? Anyone have a pic. of the specific 8" timing cover for the above dampener?
Thanks in advance! I appreciate it!
Ted

Re: 8 inch Balancer 3870325
 

To the best of my knowledge, that is just the casting number of the center section of the harmonic balancer.

Phil Woj.

Re: 8 inch Balancer 3870325
 

I agree with Phil. The casting number is the inner section of the Balancer and was used for many applications. The weight of the outer ring is what varies the balancer from ones with the same casting.
Brandon

Re: 8 inch Balancer 3870325
 

There are numbers / codes punched on the front outer ring of the balancer: 9 623 and also G2F .
They must mean something, but, what .. ?? What I am trying to establish is, good numbers for COPO L79 ???
Thanks gentlemen!
Ted

Re: 8 inch Balancer 3870325
 

The L79 327 uses the Corvette style with the fins inside the hub.

Re: 8 inch Balancer 3870325
 

I believe the balancer you are asking about is for a big block Chevy 396 and 427, not a small block Chevy.

Jason

Re: 8 inch Balancer 3870325
 

Sorry, my bad, typo error. Should've typed L78. Trying to establish exactly what engine this came from.
Anything on the codes make sense?
T.

Re: 8 inch Balancer 3870325
 

I have a NOS L78 shortblock, tomorrow I will check the balancer markings.

Re: 8 inch Balancer 3870325
 

I'd sure appreciate that. Could you also take notice of anything specific to your timing cover also?
I believe I have the cover that came with the balancer. Just not sure if L78 COPO etc etc. or a common setup?
Merci Mr Furback!
Ted

Re: 8 inch Balancer 3870325
 

I believe the timing cover for the 69 L78/L72 is unique to that year only. I can't remember what's unique, but I think it has to do with the timing tab, and maybe the locator pins.