The Eagle crankshafts also have the serrations. When we ordered the 467 stroker kit from Butler earlier this year, we made sure to have him polish the serrations so that it wouldn't give any problems using the 2-piece Tin Indian Viton seal that we used. He told me that it used to be a problem with the Eagle crankshaft years ago, the serrations were way too aggressive,, and they would eat the seal up, but he said nowdays there isn't normally a problem with them, but he offered to polish it for us anyway for an extra 25 bucks, so we opted to do that, because we figured 25 bucks is cheap compared to eating the seal up and all of the work that has to be done to correct it Lol.
As long as the crankshaft is smooth enough, any of the seals he offers will work great with it. We have used both the Viton 2-piece seals, as well as the 1-piece seal with great results.
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1978 Trans Am
Pump Gas 461 Stroker
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