In 1963 the 327 engines were 250/300 HP in the Impala- in the corvettes 327 engines were rated up to 340/360 hp--the 340 was carburated with 11.5 compression the intake valves were 2.02" and the exhausts were 1.60 "--- the 360 hp engine was fuel injected
I had one with the big Daytona tank & knockoff wheels--my vet was a 62--same power as the 63'
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