Im building a factory motor for racing and I was wondering if there was ever a 461 Chevy head that came on a motor with under 10.25:1 compression. Any help would be great. A year would be even greater
In 1967 and 1968, the base engine 327, 300 Hp in the Corvettes had 10.0:1 compression (and only in those two years). I think that these are 461 heads, as were used on the prior 300 hp Corvette engines.
The 461 heads were casted from 1964 to 1966.
The 461X heads were casted from 1960 to 1963.
Over the years one thing I always noticed about the 461's where they had smaller chambers than the later camel back heads.
I don't think they ever came on a engine with less than 10.5:1 compression.
During those years only 2 small blocks were in production, the 283 and the 327.
I was afraid to hear that. The rules are so picky. What is the next best head to the 461s that came with a motor less than 10.25:1? Ex..462,186...etc. thank you for your input
Word on the Corvette Forum was that the 300 hp, 10.0:1 '67 used the 462 head. The 300 hp '68 with 10.0:1 used a 291 head.
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