Heads for mild 360 build

We see what you were trying to do. I don't think there's a one of us here that would put any money into a bad pair of heads. But that was not the question. Basically it gets down to if you're going to use the cast iron heads the J head is one of the best alongside of the 308s. And a 188 intake valve will take you into the low 12 second bracket without a whole lot of work.
Simply why I seldom post or offer suggestions/opinions much here anymore. I simply gave my opinion that I think the J heads would work, answering exactly what the OP asked. Woof, my opinion attacked, asked if I inspected his heads (lol) and "off the tracks" on the first page.