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Old 11-11-2011, 03:24 PM
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Originally Posted by gmc1990rodder
...the suffix numbers/codes on the front of the block are T0414CKP...
CKP - '72 400cid, Impala, 170 HP, RPO LF-6, TH400 w/2-Brl carb.

Maybe someone knows the factory torque rating for it- I have Chevrolet manuals but they're either newer or older than '72. The factory ratings started taking a hit in '71 w/the lower CR, etc. required by the fedgov, and how the power ratings were figured changed from gross to net- which made the '72-up engines look 'weaker'.

Bottom line is it really doesn't matter what it HAD, it can make 400-plus ft/lbs w/relative ease.
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