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Old 11-30-2009, 03:01 PM
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250 into 52

I have a 1952 Belair and a 1983 250 (w/intergral head) from a C10 pickup. I was wondering if I can dump the integral head and replace with a non-integral head of a earlier year, say mid sixties. I would like to put the 250 with a 4 barrel (390 cfm?) and headers into the '52 Belair . . . Any help is appreciated.

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Old 11-30-2009, 06:30 PM
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YES!!! The ideal head would be one off of a 194 six; the casting number is 3864883. Mill that head .060, and on a stock 250, it will bring the compression ratio to about 10:1. HEI distributor, reworked, a Clifford intake with a small 4 barrel, headers, and a mild cam will do wonders. Further work on the head to improve on the siamese posts will really help.
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Old 12-01-2009, 07:09 AM
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Thanks for the info - just what I was lookin' for. I have a rebuilt head w/casting # 331184. I'll do some hunting to find out what this goes to.

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Old 12-01-2009, 12:47 PM
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That head has 73cc chambers, and is from a 250. The 194 head I mentioned has 60cc chambers stock. You could probaly mill your head down to 65cc chambers, and wind up with about a 9-9.5 compression ratio.
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Old 12-01-2009, 01:43 PM
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Quote:
Originally Posted by junior stocker
That head has 73cc chambers, and is from a 250. The 194 head I mentioned has 60cc chambers stock. You could probaly mill your head down to 65cc chambers, and wind up with about a 9-9.5 compression ratio.
Which might be a better choice with today's fuel.
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Old 12-01-2009, 04:53 PM
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The head I have (casting # 331184) has supposely been rebuilt. It is all clean and the valves look new. How can I tell if the head has been milled? Is there a specific measurement that can be taken? I guess I could pour some liquid into the combustion chamber and measure the cc's . . . . How are the cc's in a combustion chambers useally measured?
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