honestly the only remotely special heads on a 351 were the ones on a Ford Lightning from 93-95 but the chances of you finding that are low to non-existant. If you do, I want the intake manifold. Its not the same as the regular truck one, but it will clear the hood if I ever decide to put a 351 in the Lincoln. I already have a set of the 351-specific AC brackets needed for that. Frankly I'm unlikely to ever do it but if I can lay my hands on the goofy rare parts I have no issue putting them on the shelf just in case.