The CKR suffix indicates the engine is a 1977 Camaro 350 cubic inch V-8. My Motor Magazine repair manual does not give information about carburetion of horsepower ratings for that particular engine code. Depending on carburetor and camshaft options, the horsepower and torque ratings can vary widely for 350's. That one is probably a 9:1 compression model with 76 CC cylinder heads, set up for unleaded fuel. Late-model 350 V-8's such as that one have a thinwall casting design for weight reduction, and shouldn't be rebored beyond .030" oversize during rebuilding. Earlier engines could be bored .060" without overheating or cylinder cracking concerns.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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