273 Harmonic Balancers

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Rustyfish

Rustyfish

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Does anyone know if they are the same all years or are there differences like pre '66 heads and intakes? Thanks
 
Should be same as all 273, 318 and internally balanced 340.- this is wrong see below post. Sorry.

I just got a new one from Napa. With new seal was like $100.00
 
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Syleng1 said:
Should be same as all 273, 318 and internally balanced 340.

I just got a new one from Napa. With new seal was like $100.00
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There are different balancer between early and late smallblock. It's different from the year they moved the timing tab to the drivers side. It was built in in the timing cover.
 
65dartcharger said:
There are different balancer between early and late smallblock. It's different from the year they moved the timing tab to the drivers side. It was built in in the timing cover.
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Oh shoot- you are correct! Also the pulley bolt pattern is different. I’m sorry for the wrong info.

Anyhow- Napa got me one for my 66’ 273 a few days ago. It was spot on. I did not even think twice because they asked 273 or 273/318?!? I said straight up 273... “okay.”
 
Ok guys thanks. I need a new one for my '65 273 Charger engine. The pulley bolt threads are fubared.
 
Syleng1 said:
Oh shoot- you are correct! Also the pulley bolt pattern is different. I’m sorry for the wrong info.

Anyhow- Napa got me one for my 66’ 273 a few days ago. It was spot on. I did not even think twice because they asked 273 or 273/318?!? I said straight up 273... “okay.”
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Do you have a part # for that one? Timing tab on passenger side correct?
 
Nothing from Rockauto, Oreilly's or Advance Auto either.
 
From what I've seen and done myself, all the internally balanced small block balancers will work on the engine (and not cause a bad vibration) with the following caveats. '69 and earlier have the timing slot cut for a passenger side timing marker and have one pulley hole staggered (it can be oblonged to fit the later pulleys however, and vice versa). The '70-2 have the timing slot on the driver's side and also have the staggered pulley pattern. The '73 and up balancers have an even bolt pattern where the pulley can mount 6 different ways. Now, I have seen different appearances on them through the years. some outer rings are squared off, flat and have even surfaces both front and back. Others have a half round groove cast into them for whatever reason. And when it comes to using the poly 318 balancers, they had both a manual trans part number and automatic part number. I don't know why and have swapped them without any ill effects. "66-9 balancers use the same 2658458 part number for 273-318-340 engines except for the '66-7 poly 318 with an automatic trans. which is 2658459. The '64-5 273 has a part number of 1947235 (both automatic and manual trans) like the early poly 318's with a manual trans. where the early poly 318 automatics use part number 2402090. Very strange.
 
cudamark said:
That one is for a slant 6.
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Makes sense. It says "may fit your 1966 dodge Dart." NAPA doesn't ask for the engine size when you set up the car information. No other choices.
 
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