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'71 block??

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Old 07-13-2005, 04:22 AM
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'71 block??
I've failed to get up useful info searching. I've heard there is a difference in the '71 block. Is that so and if so what would those differences be and does it matter in a truck application.

thanks sooo much!
 
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Old 07-13-2005, 04:57 AM
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the 71 engine is the only worth while 335 series engine ever built. it had a lot of power ,after 71 it became a smog dog.
 
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Old 07-13-2005, 08:22 PM
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The only difference I can see in the block is the screw in core plug above the lifter galley on each side. There is no evidence of the block being stronger. I used to have one around here but I junked it.
 
Last edited by mark a.; 07-13-2005 at 08:25 PM.
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