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66 427 engine stamp help

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Old Feb 6, 2010 | 03:24 PM
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Default 66 427 engine stamp help

can anybody tell me what TO331IP means on the stamp pad?
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Old Feb 6, 2010 | 03:33 PM
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Originally Posted by SignMan59
can anybody tell me what TO331IP means on the stamp pad?
425 hp manual trans.......
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Old Feb 6, 2010 | 04:01 PM
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T - Tonawanda (casting origin)

0331 - March 31 (engine assembly date)

IP - 425 Horsepower
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Old Feb 6, 2010 | 06:44 PM
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actually the code 'IP' was used for the 450 HP 427 and 'IK' is the 425 HP 1966 427 engine... which in reality is the same engine...Could be a difference of opinions as to why two codes used on the same engine parts in the same car...It brings to mind L78 396 engines too
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Old Feb 6, 2010 | 07:23 PM
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Originally Posted by Ironcross
actually the code 'IP' was used for the 450 HP 427 and 'IK' is the 425 HP 1966 427 engine... which in reality is the same engine...Could be a difference of opinions as to why two codes used on the same engine parts in the same car...It brings to mind L78 396 engines too
I believe the IK is for the 427 cars with M22, and IP was the 425/450 hp cars.


Gerry
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Old Feb 6, 2010 | 08:58 PM
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IP is L72. The IK code is subject to debate, from what I have read in discussions passed is that the IK code was reserved for the 66 L88 that supposedly never made production. I have yet to see any picures of an IK pad.
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Old Feb 6, 2010 | 09:12 PM
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Originally Posted by snydes
IP is L72. The IK code is subject to debate, from what I have read in discussions passed is that the IK code was reserved for the 66 L88 that supposedly never made production. I have yet to see any picures of an IK pad.
i was told the ik pad was for the 961 block,....i have never seen a 961 block in a 66 either.....
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Old Feb 7, 2010 | 02:13 AM
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"IK" was for the M-22

"IP" was the L-72 whatever horsepower you want to call it 450 / 425 / 600 / insert huge number here.
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