Question about Mopar Performance hemi block

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Question about Mopar Performance hemi block #576642 01/08/10 03:21 PM 01/08/10 03:21 PM
Joined: Oct 2009 Posts: 9 Broken Arrow, Oklahoma J Joe67GT OP member
Joe67GT OP member J Joined: Oct 2009 Posts: 9 Broken Arrow, Oklahoma	Hi guys, a friend of mine has a new hemi block, casting #2468330-M. He is wondering if this block can be bored to 4.5 inches, and if so will it be streetable? Thanks! Joe

Re: Question about Mopar Performance hemi block [Re: Joe67GT] #576643 01/08/10 07:39 PM 01/08/10 07:39 PM
Joined: Nov 2003 Posts: 2,715 closer to Canadian beer! torkrules I'm neurotic
torkrules I'm neurotic Joined: Nov 2003 Posts: 2,715 closer to Canadian beer!	Quote: Hi guys, a friend of mine has a new hemi block, casting #2468330-M. He is wondering if this block can be bored to 4.5 inches, and if so will it be streetable? Thanks! Joe I'm pretty sure that block is resto block with non-Siamese bores. These have a standard 4.25 bore and I wouldn't take it over .060" unless you had it sonic tested, but even then i doubt you could go another .25". Even the Siamese blocks needed to be sonic tested if you are going to 4.5" If you want to tell for sure, just stick a wire through the water holes on the deck and try to thread it to the other side. If it doesn't go through, it has Siamese bores, or you could shine a light into the water holes and see if you can see the light on the other side of the deck.

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