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Max bore on a 305 block

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06-22-2008, 09:27 PM

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Max bore on a 305 block

What is the max over-bore you can go for a 1990 305 chevy block while having some meat left?

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06-22-2008, 09:38 PM	#2
Kevin91Z Moderator Join Date: Jul 1999 Location: Disneyland, SoCal Posts: 10,488 Car: 1991 Camaro Z28 Engine: 350 L98 siamesed runners Transmission: LT1 T56 Axle/Gears: 9-Bolt 3.70 Classifieds Rating: (1)	Re: Max bore on a 305 block .030" is easy, .060" is pushing it. You should have the block checked over professionaly before you go .060" bigger. __________________ 377 RWHP, 390 RWTQ (05-21-11) 12.803 @ 108.50 MPH (1.923 60') (04-11-01) Work: Manley Performance Products Founder: SoCal Thirdgenners Founder: SoCal TPI Organization

06-22-2008, 09:38 PM	#3
five7kid Moderator Join Date: Mar 2000 Location: Littleton, CO USA Posts: 39,542 Car: 82 Berlinetta(2)/57 Bel Air Engine: LS1 (LS1)/LQ4 Transmission: 4L60E (T56)/4L80E Axle/Gears: 10B 3.73(9" 4.11)/8.2" 4.11 Classifieds Rating: (11)	Even better question: Why bother? Find a 350 shortblock and rebuild it.

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06-22-2008, 09:38 PM

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Max bore on a 305 block

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