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I have a set of 78 351w with smog provisions will they bolt up to a 89 5.0?
Also I have a set of ped rockers that look to mount the same way as the 351w is this correct? I am trying to put together a low buck street coupe for my wife and we are using a lot of parts I had laying around.
 

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Yep and Yep..

But why are you putting these on a 302? The stock heads in the 89 are way better, Those 351W heads have huge 69cc chambers, And will not make anything for compression on a 302.

If your gonna use them, you gonna have to get steped washers or them special ARP studs, Because the 351Ws have 1/2 head bolts. where the 302 only has 7/16...
 

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There is no advantage to running that late of 351w head! Starting in 1976 the heads for the 351w shared the same size ports and valves as the 302. Now earlier 351w heads had larger ports and valves
 
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