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#1 |
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Location: Boulder City, Nevada 89005
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I would want .175 or more at finished overbore in a big block mopar or .135 in small block mopar.
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John Irving 741 Stock 741 Super Stock |
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#2 |
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Location: Fabulous Las Vegas
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Thanks John,
Are you back in town? - you happen to have a sonic checker? call me I still need some wheels.
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Jeff Dudgeon '66 Coronet #10771 - bracket puke "the Flying Brick" |
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#3 |
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Join Date: Dec 2001
Location: Elysburg, Pa
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The only blocks that are that are thick are the 413 industrial and motorhome, most 440s are less than .175" before boring and 700HP would be about the safe limit IMO. The aftermarket blocks are the way to go if you can get one. The 400 blocks are a bit stronger in the web area and more rigid due to the shorter cylinder length. A 400 block filled Halco machine grout and Pro-Gram Engineering main caps would be a good start.
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#4 |
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There were some thick blocks in 67-69 era. Back when I was more adventurous, we took some old blocks, filled them, bored/honed to 4.560 and put a 4.625 stroke to make an alcohol 604" It required a main girdle and good caps to hold things since the cylinder walls were at .060" +/- a little.
They didn't stay round very long as one might expect. That was back around 1990 and the only aftermarket blocks were KB. Thought it was worth a try. It wasn't.
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Todd Gross 3323 FS/E,F |
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#5 |
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We have seen thick and thin blocks......No matter what year
the 440 blocks are. Just have to check them.
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John Irving 741 Stock 741 Super Stock |
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#6 |
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Join Date: Oct 2009
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I bought the 440 out of a 1971 New Yorker and it had the thickest cylinder walls, at about .220. That block also had water pump bosses cast into the back of the block, over the top of the bell. I assumed it was supposed to be a boat part.
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#7 |
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I have a friend who had a 426 NASCAR (Petty) Wedge block that was stupid thick on the thrust side. How many of those are out there.
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