Originally posted by STINEY
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and every one piece rear seal 350..
be it a 87 up 350 or a vortec 350..
they all have that big weight spot welded to them..
no matter if they are in front of a th400 or a 7004r or a 2004r.
That weight is to make up for the weight removed from the crank end flange on the one piece rear main seal cranks..
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