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My son wants use a set of ported/polished E7TE heads on the 351W that I bought for him but noticed a little problem with the bolts. Any ideas on this?

Thanks,
Ron
 

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The bolts and bolt holes on a 351 are bigger IIRC The same reason that you need speical bolt washers to use 351 heads on a 302(5.0L)
 

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I believe you can just drill out the heads to make them fit correctly.
 

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289/302's use 7/16" head bolts. 351W's use 1/2". You must drill them out, preferably on a drill press or mill. Also use a later model 351W intake. Early versions used 2 extra bolt holes per side.
 

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You'll need to drill the bolt holes out to 1/2".
 
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