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Old 01-22-2007, 10:18 AM
Rough-Rider Rough-Rider is offline
Tyler
  
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71' 350 #7 olds heads on 79' 403 olds
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!
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