A few 493 we have put together have not had issues using the 1009 gaskets. Is there a known issue we haven’t experienced yet? The 1009 is listed as 4.410 bore . Unless you have a big champher at top of bore what issue can you have ? Tex Yep. I was gonna use a 1009 since it fit my Indy ez heads but laying them on my '77 440 block. it overhung the bore chamfer but didn't on my back up '72 440 block. So it depends
'68 Coronet 500 w/ Indy EZ-1 headed 446, 727 trans, 9" rear
First day at the track with SUV street tires and no traction: 1.688 60', 7.24 @ 101.79 in the 1/8 mile
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