Thread: '97 GEN VI 454 Vortec
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10-04-2006 05:28 PM #9
that is a check valve or bypass same number #25013759 that is it one under the oil filter adapter and one that is used for the filter i never put the one in the block under the filter adapter this adapter threads in the block and the check valve is up in there why would you use a double roller chain it will not fit the small bolt pattern cam? yes you can buy cover for the old mark 4 chain set and a mark 4 cam to fit in that cover i have used them in race engineLast edited by pat mccarthy; 10-04-2006 at 05:42 PM.





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Yep. It’s pretty sad.
Dead!