69 302 or 70 LT1 balancer?

**PapaSmurf** · #1 02-02-2015, 10:53 PM

Hello All
Bought this balancer last year assuming it was for a 69 Z28 but on further investigation I think it might be for a 1970 LT1. It appears to be 8 inches in diameter & 1 5/8 thick.
You feedback would be appreciated.

**Billohio** · #2 02-03-2015, 01:28 AM

Hi Ervin
Should be a 4 digit number on the front?
Its not a 69, heres is one

**PapaSmurf** · #3 02-03-2015, 02:31 AM

Bill
There is a 4 digit number on the front - 1947
The number on the balancer thats on the engine now is 2224

**enio45** · #4 02-03-2015, 03:33 AM

assembly line 69's have the larger Y on the front of the balancer like Bill has posted....

**Salvatore** · #5 02-03-2015, 04:04 AM

The balancer you bought should work fine. The 70 LT-1 balancer is the replacement for the big "Y" balancer as Ed and Bill have stated.
I believe the big "Y" balancer with the offset timing mark was a one year style.

**ZLP955** · #6 02-03-2015, 04:23 AM

The number on the block face is the casting number and the 4 digits on the front are usually the last 4 of the GM part number. I'll see if I can find out what '1947' is in any of my reference books.
Timing mark relative to keyway looks to be in the right spot for a 69-on application and as the guys have said, the short spokes are typical of later service replacements and 1970's factory style balancers.

#7 02-03-2015, 05:12 AM

69 302 balancer is # 3947708

**PapaSmurf** · #8 02-03-2015, 02:38 PM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ZLP955</div><div class="ubbcode-body">The number on the block face is the casting number and the 4 digits on the front are usually the last 4 of the GM part number. I'll see if I can find out what '1947' is in any of my reference books.
Timing mark relative to keyway looks to be in the right spot for a 69-on application and as the guys have said, the short spokes are typical of later service replacements and 1970's factory style balancers. </div></div>
Would different build dates have different balancers?
The car is a Sept. 3, 1969 build date & the engine is original to the car but has been rebuilt once

**Salvatore** · #9 02-03-2015, 05:13 PM

Should look like BillOhio's.
The offset timing mark is 69 and up. The 67-68 Z/28's and the L79's have the same type balancer as the "assembly line" 69 Z/28 BUT the timing marks are lined up. After 1969 the balancer's were the LT-1 style and the GM replacements for the 69 Z's were the LT-1 style.