302 heads will fit a 351, the holes for the bolts just need to be drilled out larger.
why don't you just get a set of roller rockers for your 351 heads? are the pedestal or stud mount rockers on there now?
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NMRA O/C 9516
NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft
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