Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 71' 350 #7 olds heads on 79' 403 olds
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Old 01-22-2007, 12:37 PM
MRGM MRGM is offline
Im trying to have an idea!
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Originally Posted by Rough-Rider
hey guys...i have another question, im wondering what kind of modifications will have to be done to the 350 heads besides drilling the 7/16 bolt holes out to 1/2" to fit on my 403??

thanks for the help!
i beilve that would be it...

You may want to check out there are some persons with that same combo, they could probably give very detailed descriptions there.
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