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440 block #537926 11/27/09 07:39 AM 11/27/09 07:39 AM
Joined: Jun 2009 Posts: 227 Bowling Green, KY K KY Charger OP enthusiast
KY Charger OP enthusiast K Joined: Jun 2009 Posts: 227 Bowling Green, KY	I was wondering how good a 78 440 block would be for a stroker motor and how much these blocks can be bored over. I've read articles about there is no difference between earlier and later 440 blocks as far as cylinder wall thickness just some difference in the cast iron. I figured some of you guys had first hand experience with these.I'm looking to go up to 528 stroker haven't decided maybe 500 or 512 the car will be a street driver more than anything. Just cant let any Vettes out-run me, since I live in Bowling Green, KY home of the corvette plant.

Re: 440 block [Re: KY Charger] #537927 11/27/09 07:57 AM 11/27/09 07:57 AM
Joined: Jan 2003 Posts: 1,022 Andrews,In. U.S.of A. 6 67_Satellite super stock
67_Satellite super stock 6 Joined: Jan 2003 Posts: 1,022 Andrews,In. U.S.of A.	If the cylinder walls sonic check O.K.,and it's not cracked anywhere,it ought to be as good as any other factory block.

Re: 440 block [Re: KY Charger] #537928 11/27/09 07:58 AM 11/27/09 07:58 AM
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: I was wondering how good a 78 440 block would be for a stroker motor and how much these blocks can be bored over. I've read articles about there is no difference between earlier and later 440 blocks as far as cylinder wall thickness just some difference in the cast iron. I figured some of you guys had first hand experience with these.I'm looking to go up to 528 stroker haven't decided maybe 500 or 512 the car will be a street driver more than anything. Just cant let any Vettes out-run me, since I live in Bowling Green, KY home of the corvette plant. The stock bore on a 440 4.32. On a good block, you could go .060, which give you a bore of 4.38. With a 4.15 stroker crank, you would get 500". You could go 4.25 on the stroke, but you might need to go with chevy sized rod pins and connecting rod big end or go with external oiling. Others can chime in as to whether a 4.5" stroke crank would fit, but with that big of a crank, I don't think the block would take it very long unless you have a girdle installed. As for the 78 block, its hit and miss. Best thing to do is have it sonic tested to be sure. Thin cylinder walls and big power don't mix.

Re: 440 block [Re: torkrules] #537929 11/27/09 10:10 AM 11/27/09 10:10 AM
Joined: Jan 2003 Posts: 6,416 Abilene, Texas F fastmark master
fastmark master F Joined: Jan 2003 Posts: 6,416 Abilene, Texas	I have checked about 20 blocks that I owned and my later blocks 76-78 usually check better that my earlier blocks. Spend the $75 bucks and get it sonic checked to be sure, though.

Re: 440 block [Re: fastmark] #537930 11/27/09 11:07 AM 11/27/09 11:07 AM
Joined: Jul 2006 Posts: 139 MA L limelight440 member
limelight440 member L Joined: Jul 2006 Posts: 139 MA	Check out the engine block info at 440source.com I found they have done some interesting comparisons. More cubes you stuff into a block is only better to a point. With increased stroke / shorter rods the engine will side load the pistons into the cylinder walls. If someone tried to sell me something that needed chevy rods and or external oiling, thats an indication that i've passed that point.

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