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| | | | Joined: Aug 2011 Posts: 149 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2011 Posts: 149 | I have a 327 eng.today I bought a new set of fly wheel bolts to find I am in mess.the old set are metric.chhecking with different,5storesi find out everone only sells American standard.7/16 fine..whats the real answer guys? thanks | | | | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 | LS1 (gen III) has metric bolts, flywheel is M11 x 1.5 (11 MM). That would be about a 347-348 Cu In motor. This would be called by many as a good old 350/5.7. McMaster Carr and others have metric bolts. Ace hardware has metric bolts. Dealer has them. ARP has them. Jeggs, Summit, RockAuto. Be sure you know what size/pitch/length you have. Most other SBC have 7/16-20 as you say. Quickest place: O'Reilly's has M11 X 1.5 under 1998 Corvette. Part No. 330-2802.
I don't know what motor you have or what bolts, so the above is just food for thought. If you ask for 327 bolts you will get 7/16-20.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
| | | | | Joined: Nov 2014 Posts: 13 New Guy | | New Guy Joined: Nov 2014 Posts: 13 | agree not metric fine threads . Also a thiner bolt head , at least that was the case with my 327 365 horse solid lifters. ( 1965 ) Good luck | | | | | Joined: Jan 2013 Posts: 1,384 Shop Shark | | Shop Shark Joined: Jan 2013 Posts: 1,384 | 7/16-20 are a common grade 8 bolt size, but as said the heads are too thick. You could machine the heads down. | | |
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