The stock block has nothing to do with weather or not you O-ring the heads.
As PKRWUD stated only 10 bolts hold down a 302 head. With boost you need all the help you can get.
IMO,
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim.
00' Lightning-Stock
88'CRX-13 second ego killer
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