IMHO. I don't think they would sell. The restoration guys wouldn't buy them without the casting #,s and date codes that fit their needs. It would be a nightmare to try to please those guys demands. The guys that want to build power would just buy aluminum heads.
You can still find the big valve factory d port heads for reasonable prices. Im thinking that copies of the 1969 RA 4 heads would be a better bet. The date codes were missing on those so the resto guys couldn't complain.
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