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Also take into consideration the fact that there are two major sizes of transmission locator holes in the bell housings, 4 11/16" and 5 1/8". If you have a large hole bell housing you may need one of these adapter rings depending on the size of the input bearing retainer on your trans. Very important you have a snug fit on this.
http://dennymac.com/mod.php?mod=user...103&page_id=54
Some good info here too...
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