Fwiw: I lost my 462 a coulpe of years back due a #3 cylinder collaspe!! Cracks in block were present from DS M mount/rail to point of #3 cylinder wall destruction. Even near boss on outside of block.I had been using solid mounts. Cracks came from water jacket side. Think I posted pics here?? I have since went with a allpontiac.com front plate + stock soft mounts.
I think a torque limiting "something" is a must on high HP motors..
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ECM member.
2008 Outlaw Pontiac Drag Series Champion
MANDRA
Do it now fool! Life is short.
69 Grand Prix/3163lbs / IAII 535 w/ Tiger heads by Gaydosh....9.35@ 144 so far..  through mufflers. 1.26 60'.
Going back to track with pump gas engine....
My 60 Ventura retired to street/strip duty..
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