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Discussion Starter #21
This guide suggests, if my casting reads E0AF D3C, that its a 1980-84 302. If 50oz was introduced in 81, it could still be either?
757127
 

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Definitely you have the 50oz crank. Absolutely missing that weight is going to cause vibration. Put the correct weight on the flywheel, button it up and see if it still vibrates. If it does then you have the wrong balancer designed for 28oz. If it runs smooth you've saved yourself a little time and money.

Do you have the original flywheel that came on the motor? The reason I'm asking is because at the factory the whole rotating assembly is balanced as a unit. Take the flywheel that came with the motor along with your new one with the weight and have a shop exactly match the old one. I had a slight vibration with mine, took it off and had a shop match it to the old one. It wasn't that the new one was balanced incorrectly it was more that it didn't exactly match the factory flywheel which could have been out of spec. Anyway I'm glad I did. The engine runs smoothly now. There was a 10 gram difference between mine
 

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Discussion Starter #23
I don't have the original flywheel or harmonic balancer. I have a weight on order to convert my Pro-Street harmonic Balancer from 28oz to 50oz. I've bought a 50oz cast iron flywheel, but I was worried all this could be a big waste of time and money if all I need is the missing 28oz weight for my existing billet steel flywheel (PCE229.1009).
You are certain it's a 50oz crank from what you can see in the pictures?
 

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50 oz, I would replace front and rear oil seals, center the front one, call the flywheel manufacturer for another weight, and loctite that bugger in.
 

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Discussion Starter #26
Cool. So its definitely 50oz.
I'm in the UK, so not easy to get a weight. Can anyone tell me who is the main dealer for that make of flywheel over there? I dont think anyone sells them over here
 

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Hey Billet-Brain, that part number shows to be a pro-comp 157 tooth flywheel with a welded 28 oz imbalance.
 

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Discussion Starter #31
I also thought it looked like the Summit and Jegs own brands. That said, does anyone know where I can get a 50oz counterweight, cos I cant find them anywhere
 
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