For the power pak heads look on the front of the head for a triangle, that id's them as power pak 194 intake.Double hump/camel hump id's them as 202 intake.Price of a good 283 is what ever someone will pay,most go for the larger CID.327,350.

1953 Chevy Two-Ton
In the Stovebolt Gallery
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Be careful calling yourself a expert,because an "EX" is a hasbeen and a"SPERT" is a drip under pressure.